1) Some of them are caucuses, which are actively antidemocratic in these ways:
1a) Public balloting, meaning intimidation is a factor
1b) Severe time commitment, disenfranchising people who can't afford to make it out
to a high school gymnasium for a few hours on a weeknight
2) Some states vote late, meaning they aren't afforded the same breadth of choice of
candidates as the early states, since some have dropped out by then
1. You are also forgetting public transportation. Small towns do not have buses. How does someone who live in public housing with no car get to the high school gymnasium?
2. Yeah, a big argument back in 2016 was that the primary was basically over by June yet the largest state had no impact.