My thoughts on that are if we do not clean up the Democratic party before the next set of elections they will have no incentive to do so themselves. If they can be re-elected by still caving in to Republican fascist policies they will make no efforts to improve themselves. In my opinion.
It is a bit of a double edged blade in that regard.
Not really. If the centrists are not removed from the party you might as well just vote for the Republicans. Dems will just keep voting for MAGA policies like they have been doing & like they did all through the Biden administration.