The game is rigged. First past the post forces this kind of devil's bargain, and if we ran an America simulation a thousand times you'd get bored of seeing it. Additionally, neither party's leaders will ever have any motive to accept an alternative voting system at the national level. Unless you're advocating accelerationism (itself a deeply unethical route), it makes sense to keep playing the rigged game for now while we build a dialogue about radical reforms.