New Theory: Biden staying in the race until the convention is an intentional way to avoid having actual primaries and allowing the party elites to just choose their own candidate

They don't trust voters not to choose a succdem and offend pwecious widdle capital, and they're worried they couldn't fix a second election after 2020 almost went to Bernie despite their best efforts. So now they're just propping up the old man strategically until it's too late and they can put whatever blob priest into office they like without the unwashed masses messing it up with their "democratic will" or whatever. Technocrats must sit the eternal throne whether the people want it or not.