> It's true that partisan politics provides only coarse choices. That's true of America's bipartisan system as well as multiparty parliamentary systems. But the parties are still dynamic coalitions that can change dramatically over time. Just look at the difference between the 1950s Democrats vs the 2000s Democrats, or the 2015 Republicans vs the 2020 Republicans.
You're missing my only point, which is how (say) a coarse 51% victory for a coalition gets frequently and deliberately misrepresented as "the American people" wanting that coalition's unpopular policies.
American politics isn't really about representing the American people, it's about minority ideological factions jockeying for power to subject the American people to their vision. Hence the rise of campaigning that's mostly attacking the opponent. A recent example is the Democrats vis-a-vis Trump: despite all their rhetoric, their behavior over the last decade belies an attitude that they think they use the repulsion he generates to avoid moderating themselves and still win.
