Phrases like “Defund the police” are chosen because they are strong, jarring, and attention grabbing. Who’s going to give the “”knock knock: can we please reduce the policing footprint in America and reallocate some of those resources?” movement the time of day?
The liberal dilemma. Each group sloganizes. MAGA, BLM, etc...
The "left" (and the "left" is not some sort of singular person or cabal) has chosen or ended up with some slogans that can best be characterized as trying to move the overton window by being intentionally hyperbolic or exclusive, compared to MAGA, which is really sort of non-controversial, I mean, do you not want America to be great? Of course you do. And by doing so, the MAGA people have owned what "great" is supposed to mean.
So the question is, does the hit you over the head with a hammer slogan do better than something else? What would be a better one - remember it has to be catchy and succinct. Maybe long term, the window moving one is better. But it causes some short term angst.