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[Superheroes] Would costumed heroes gain a tactical advantage by dressing as “generic” as possible? e.g. ski mask and street clothes disguise

I know, I know, the costumes are meant to give the public something to cheer for, to intimidate their enemies and let law enforcement and other superheroes know who’s who, as well as providing additional protection, gadgets and enhancements to abilities.

But surely there’s something to be gained for (at least some) heroes to adopt a costume that obscures their “superhero” identity as much as possible? If their costume does special things, and if it’s feasible, they could wear it under ordinary looking clothes, no?

For example, Superman and the Martian Manhunter both have easily identifiable weaknesses (kryptonite and fire) and a broadly similar power set. What if they switched up their costumes on the regular to confuse their opponents? I mean, yeah, smart opponents would be able to figure who’s who after a couple seconds, but that little bit of uncertainty would be worth it, right? And even if they want to inspire hope in the population or whatever, they could have press conferences afterwards to tell people what went down - it’s not like individual firemen and doctors have their own gimmicks and costumes so people can cheer them on while they save lives.

It’s like how high ranking officers in wartime try to dress and move as generically as possible so that snipers and air strikes and ambushes are less likely to take them out. With good intelligence gathering and guesswork, you could figure out which one the general is, but the effort your opponents need to do so grants you a tactical advantage. 

Or the Bat family, for example - instead of wearing colorful costumes, they could wear their armor and gadgets hidden underneath regular looking clothes, and either wear some Mission Impossible style face disguise, or just a full head mask. They would have the physical protections and advantages of the bat costumes, with the added benefit of an extra layer of anonymity.

That way, they can sneak up on their enemies way easier without having to do a cumbersome costume change, blend into crowds, switch disguises on the fly (etc. changing into a green sweater instead of blue jacket), blend into crowds etc. it would also hinder their enemies’ attempts to track their movements. By having clear identifiers, it’s possible to easily track their actions in the city (e.g. Robin is busy uptown, Batgirl is fighting Clayface near the power plant, Batman is occupied with the Joker doing a bank robbery. That leaves us free to kidnap the mayor!) if, instead, they adopted a variety of generic looking disguises, it would throw doubt as to just how many “Batmen” vigilantes there are out there.

And they can still retain the Bat motif as a symbol of fear/hope, by leaving a graffiti calling card or something. It would also make criminals doubly paranoid of Batman/Batmen - they now know that literally anyone on the street (old man, young kid, teenage girl etc.) might suddenly pull on a bat mask or ski mask or whatever and open up a can of martial arts spy gadget whoop ass on them. 

Same goes for supervillains - though I can understand why supervillains would want to stoke their egos in such a way.

There’s probably an argument to be made for having costumes vigilantes be easily identifiable for the interest of public accountability - kind of like how policemen have to have name tags and serial numbers so people can (in theory) prosecute them if they abuse their power. 

But supervillains love using that against their opponents - I don’t know how many times Spider-Man and Daredevil have been framed by their enemies getting someone to dress as them and do bad things. 

And the comic “The Boys” has a neat explanation for this kinda silly practice - the colorful costumes are nothing more than a tacky corporate marketing campaign.

And I remember there was this one time Batman was busy, so he let Superman dress as him for a day - which gave Superman a huge advantage over Batman’s rogues gallery because of how unprepared they were, and left them terrified and confused as to whether or not Batman has always been bulletproof and super strong.

The Netflix Daredevil also had decent success with a simple “pull a hat over your face” disguise. It would also help with plausible deniability. When someone stumbles across your costume, instead of having to go “oh no, I just like dressing up as (Random Superhero) on Halloween” or “Oh it’s a fetish thing, don’t ask” you could just go “oh my face gets really cold sometimes, I like keeping it warm”

So yeah, would having a “generic” costumes disguise be a boon or a hindrance? Or would it depend on the modus operandi of the hero?
gpt
You can’t be a symbol of hope (or terror to your enemies) if people can’t recognize you.

In some cases costumes are functional. Iron man is an extreme example but Spider-Man doesn’t wear armor because it slows him down. 

Worm has an interesting take on costumes and powers. Most heroes and villains keep the exact nature of their power a secret. Or even present their powers different from the truth. Partially to make sure others can’t use their weaknesses partially to make it harder to defend to them.
There’s an example of heroes switching costumes to throw the bad guys off balance. It’s explicitly stated that’s its very dangerous to fight someone whose powers you don’t fully understand.