You're talking about two different things.
Super heroes are common in Marvel comics....so Spider-Man doing a bunch of crazy shyt isn't implausible. It's an accepted part of that fictional universe.
There is no reason to think (for example) scientists would act like complete fukking morons in the "Alien" series of movies. There's no precedent for it. And it has nothing to do with the sci-fi aspects of the story, either.
You're acting like suspend disbelief = accept anything that appears on screen, regardless of logic or context. That's not how it works. There's several elements to "Game Of Thrones" that are completely unrealistic, but they're embedded in the story. Nobody gives a second glance to a dragon, or a shadow baby.
On the other hand "Breaking Bad" had several unrealistic scenes....but if a dragon popped up you damn well better have the sense to call bullshyt on it. Nobody in their right mind would sit there like
"eh, it's all fiction".
Fred.