system
Given the following post, respond as if you're commenting on Reddit:
human
[Flash] Why doesn't he just take Captain Colds gun off him?

There are many different versions of the Flash and many stories that don't quite all match up, but in all of them the Flash is phenomonally fast and can usually move faster than a normal person can blink. Another consistency is that Captain Cold is just a guy with a fancy gun.

So why doesn't the Flash just run up to him (taking a slightly roundabout route so he comes up behind him) and just take the gun out of his hands? It seems like that would solve the problem pretty quickly. You could follow up by running away a bit and hiding the gun or dropping it in a handy ocean. The same solution could probably apply to Heatwave, Pied piper, Trickster, Weather wizard, Captain Boomerang.
gpt
The Flash has a lot in common with Superman in this regard. Both are akin to overwhelming elemental forces of nature that could operate 24/7 on levels that are staggering for us to comprehend but because they are also human/human-like they dial themselves back towards our end of the spectrum. Free Will matters to them and letting people decide to do wrong when you have the power to prevent it (literally nano-seconds before you’ve finished contemplating it) is a type restraint that is alien to us. You might think less of them for not swooping into Gotham City seconds after the Joker escapes to toss him back into a cell but being godlike and acting godlike is a slippery slope.  Kingdom Come gave us a preview of a possible future where the Flash decides to let go of his humanity and operated as a god who lives between the ticks of a second.  In fact all of the JLA seemed to slide towards god-like behavior. GL became Hephaestus creating an Olympus in the heavens from which they scanned the planet. Superman became Zeus, dictating order to the lesser gods and the humans on how to behave. Wonder Woman was the militant enforcer of his will.   By crossing over that line –taking action at a speed and level beyond comprehension they made humans afraid of them. Villain and Hero alike banded together to end it all. 

So, if the Flash ripped the gun from Captain Cold, stripped Boomerang of his gear before he even said a word or stole the Wand from the Weather Wizard before he even slipped his boots on –it would unnerve the good and the bad alike.