The dems had a primary, same as the Republicans. Old Joe won. Kamala never got one vote. Appears to me as if it was a big waste of money.
Maybe, if we were smart we would take this as a lesson. It is not beyond the possibility that others might withdraw or die. it would seem to me a wise thing to make plans accordingly. Perhaps an alternate could be added to the ballot. If someone becomes disabled or withdraws in the future, the alternate could become the candidate. Maybe not perfect. Better than what we have.
There are many smarter than me. Maybe you could make your own suggestions. Whichever, we need to put it into law so as the folks in Washington can’t continue to chose who runs.