Consequences aren't the only thing that cause people to act they way they act. It's certainly one reason some people don't do certain things.
One reason Homelander is the way he is is because how he was raised. If tomorrow I got all Homelander's powers, I wouldn't instantly become a psychopath. I mean it might occur to me that any action I might take, and no one could stop me or punish me. But as Homelander observed (at least in the prior season, I'm not entirely caught up) that alienation from his fellow supers is actually a consequence he deals with.
This is exactly what happens in The Boys too
Spoilers for the first few seasons: the righteous non supers find drugs to give themselves superheroes so they can battle the corrupt super heroes. Yes, this cheat code to power begins to corrupt them too.
Further, the super hero Council and corporation works hard to replace the roles the military covers. They then become an unaccountable shadow agency that the people want to keep doing the work of the government.... But then democracy is slipping away.