Cult collapse doesn't typically ever happen quickly when the leader(s) are still alive and in power.
It takes gradual chipping away at the cult to destroy it during that time. Most MAGA and GOP will probably not give a shit if Trump is fully exposed to be a kiddie rapist and trafficker. Shit, most of them will probably be jealous.
But even 1-2% leaving the cult and starting to actively oppose it would make a HUGE difference in the power dynamic, and add millions to the resistance.
I'd also like to note, it isn't just the MAGA cult we want to destroy. Its the cult of capitalism.
How many people who aren't MAGA still love billionaires?
How many still believe in this bullshit capitalism meritocracy propaganda that billionaires spend billions spreading?
How many people still believe the neo-liberal, pro Zionist Dems still are the best choice for the opposition to the GOP, and all progressives must be yeeted?
Its about destroying that cult too. Its chipping away, but a significant chip to have.