> It's very likely that if the said small channels are indeed too small to be allowed to monetize, then they would fall under the not profitable accounts even if they were allowed to monetize.

It might take 6 months or even a year+ of dedicated uploading to meet those guidelines for most content (unless it's a really popular / trending niche like a new game, etc.).

If Youtube starts banning those accounts then they are effectively not allowing anyone else to join their platform because they would be terminated before they have a chance to get popular enough to enable ads so that Youtube can make money.