How far does your principle extend?
There's a trolley coming down the hill. There's nothing in the way, nobody is tied to the tracks. There's a group of 1000 people standing on the platform and you're one of them. Everyone on the platform is an adult with normal cognitive ability.
If at least 501 people voluntarily jump onto the tracks, they'll be able to stop the trolley and nobody will get hurt. If 500 or fewer people voluntarily jump onto the tracks, the trolley won't be stopped, and everyone on the tracks will die.
Are you going to be the first to jump onto the tracks? Will you be the 200th? If you choose not to jump onto the tracks, do you consider yourself a monster?
A, I was wondering when it would become clear to you that this is just another trolley problem, i.e. a way for people to feel smug about having found a reason when it would be okay for them to kill someone.
You try to frame it as if everyone will die if you do NOTHING.
But the Red Button is actually releasing a trolley down the tracks, and only when enough people press Blue will it be stopped. If everyone presses Blue, the trolley never moves.
As with the Button, the Trolley depends on a massive Information Dump that has to be taken as fact, and you are given only a Binary Choice.
This alone makes them capital E Evil in my opinion, as False Dichotomy is how every bad thing is sold to people (do you want Open Borders or tougher immigration enforcement?)
Life is not like that, and it is bad, bad, bad to force people to make a "lesser evil" decision when you should be jointly looking for a better way, at least to postpone or alleviate bad consequences.
With the Button as with the Trolley, whoever caused these events to happen is guilty of attempted or actual murder, and what you, an unqualified bystander, are doing is acting in panic with insufficient information or ability.
(seriously? a guy heavy enough to stop a moving trolley, and I can just throw him off a bridge? I would never ever think that that could, even in theory, work unless some Evil Experimenter has put the thought in my head and made me strong enough to do it).
You could say that it's not premeditated murder to press Red if you, as you have demonstrated, do not actually understand the consequences of doing so.