Why do winner-take-all voting systems (like in the USA) persist?

[Shodan]

@foolsguinea

]You’re still thinking in binary terms. And in fact a PR system is the opposite of gerrymandering, & the opposite of knowing you’re throwing away your vote. You have it exactly backwards. If you understood the actual process, you might embrace PR.

I don’t think I am misunderstanding.

What I am saying is that PR loses the aspect of voting that expresses my wish that, not only do I want my guys in place, I don’t want the other side in place. The US elected Clinton twice and Bush once in spite of the fact that in each instance, the majority of the electorate wanted someone else to be President.

Regards,
Shodan