It’s the natural result of decades of the only standard being “I like the letter by their name”.
Shitty people will always win in a race where cheating is legal. And as the DNC loves to point out: primaries aren’t real elections and they can just ignore results if they want, so cheating is fine.
They stopped short of saying “only an idiot would think primaries matter” but unfortunately I don’t think we’re that far away from it.