Credit unions have similar, maybe slightly lower, standards for opening accounts. They don't want to be stuck with overdrafts either.
The credit union that I'm banking with doesn't have a minimum account balance or account fees: https://www.firsttechfed.com/bank/checking/carefree_checking
Am I missing something?
Your experience with local credit unions is the same as mine. If you come in with $100 you can open an account.
Anyway, getting back to the original question - if credit unions are indeed much more flexible wrt opening accounts, and not require account fees, why are there so many people without accounts? Is it because some areas simply don't have credit unions?