Democrats can deliver because they know rank and file conservative voters are just political cucks. Any time a politician does something a Conservative doesn’t like, the Conservative runs out and buys a gun then gets on Conservative social media to have a Conservative circle jerk. When a politician does something a Leftist Democrat doesn’t like, they run for office, riot, boycott, dox, commit acts of violence or terrorism, etc. In the context of the culture war Conservatives are losers and have no stomach for what it takes to win.
Dems are all socialists of various flavors. The GOP is a coalition of Not Democrats. You have country clubber globalists and MAGA conservatives all in one GOP tent. Those are diametrically opposed agendas. That makes it easy for the GOPe to divide and conquer.