system
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human
[Marvel][DC] Why aren't more fights heavily one sided?

I've been a comic fan for years but I've really only just thought about this as I'm watching some netflix animated movies.

Why aren't more fights in these universes ultra one sided? Heroes like Hawkeye and Batman go toe to toe with characters with super strength. They're just normal people with normal durability. Couldn't one blow from the right villain just turn them into spaghetti? (Batman vs the Injustice Gang's Superwoman for example, the fight I'm watching right now).

Even characters with super powers like Black Canary or Cyclops or any number of regular to moderately durable heroes could be pulped in one blow by the right villain couldn't they?

Likewise, Superman theoretically is always on the receiving end of the first blow of a fight to see exactly how much of his strength he'll be able to tap into. Why wouldn't he use just enough strength to knock out his opponent in one blow? Its not like he isn't doing any damage to them in a long drawn out fight.
gpt
It's referenced in a Spider-Man comic a few years back (if memory serves), that, with the exception of new villains, heroes are generally aware of most villains powers and capabilities and will leave stronger villains (ie: Rhino, Juggernaut, etc.) for comparable heroes to handle (the Thing, Hulk, etc.) or heroes who have dealt with that villain in the past (like Spider-Man in the case of Rhino). This system of escalation (small-time villains are stopped by small-time heroes, big-time villains are stopped by big-time heroes/groups) keeps the heavy-hitters free for the big existential threats while also keeping the streets clear.

There's no sense sending Iron Man to stop Shocker; it would be a waste of his time, unless there's literally no other crime going on world-wide. Just like you wouldn't waste Daredevil trying to knock out Abomination. Since most of your better known heroes are at least part-time Avengers and everyone has smartphones, it's not crazy to assume Peter Parker gets a phone call from Avengers Tower when Scorpion is robbing a bank, and Peter likewise gives the Avengers a call back when he discovers Scorpion is working as a distraction for Doctor Doom.