Yes, and there are endless crackpots who believe themselves to be doing just that. Someone who is genuinely out to save the world will (unfortunately) share this same feature with crackpots; they will have to distinguish themselves from crackpots in other ways.
This seems suspiciously convenient for someone who already prefers poolside tanning to saving the modern world.
The idea that you actually can save the modern world is also convenient for people with a certain self-perception.
Yes, and there are endless crackpots who believe themselves to be doing just that. Someone who is genuinely out to save the world will (unfortunately) share this same feature with crackpots; they will have to distinguish themselves from crackpots in other ways.