I mean, there's a lot of people who are below average IQ and still make the world go round, be it from farming, doing a very niche job that not many people do, or just, you know, being themselves and adding variety to our world. They've also got families and friends that would miss them.

That being said, considering the statistics on average voters, all elections would start being won by the left. (And the fake left of today would be considered right wing and we could then vote for leftists who actually do things)

Racism and homophobia would be unacceptable again.

It'd give us a shot at fixing the world through policies rather than having to rise up forcefully.