That just applies to the people who care enough about politics or culture from either side to vote about it. The eligible voters who choose not vote in presidential elections has dwarfed the turnout of either party for 100+ years. The people who care about politics and culture from both the right and left vastly overestimate the number of folks who care as much they do, at least enough to deign to vote about it. The 24 news cycle and social media probably have a lot to do with that overestimation.
Freegards
“The only thing necessary for the triumph of evil is for good men to do nothing”
Edmund Burke