Blue Button or Red Button?

[Master Raiden]

If everyone understands the outcomes, then you can simplify them:
Red: No effect 
Blue: Instant death 

So people who want to live should press Red, and people who don't should press Blue.
The only catch is that if, for whatever reason, more than 50% of people want to die, none of them will get what they want.

So it is an easy choice if you want to live, and a slightly more difficult choice if you don't
Personally, I would press the Red button. Chances are, far fewer than 50% of people want to die, so I won't risk pressing the Blue button. And even if a lot of people knowingly chose Blue, who am I to try and deny them what they want, especially if it could cost me what I want?

I saw this shared online and was quite surprised at the results. To me, the Red button seems like the obvious choice, but 45% of votes here were for the Blue button. What am I missing?