The third one though... why do these things assume that just because someone is suddenly stronger that means they would apply more force for the same mundane actions?
because they don't know yet, especially when it happens overnight?
That doesn't really hold up. Just because you suddenly have super strength doesn't mean you'd automatically apply more pressure when you turn on the tap (or whatever), or at least not so much as to wreck it. Unless you're in the habit of using excessive force to do those things all the time.
Come to think of it, you might go a good while without really being aware at all until your limits are tested. Not that I'm saying a film should follow that route, a bit of poetic licence is required.