Because at that point it wouldn't be an inconvenience to the CA's, but to the BD's or me currently as I'm the the one running through SM support issues regarding admin/apprentice/supporter not working from being added before the servers, incorrect info input, or just an error somewhere. It isn't really worth the effort to keep track of these things and demote someone just because of whatever reason.
It isn't just the CA's who get a vote, some people do get held back when the votes go to BD's for whatever reason. I don't actually know you so I don't know your reasoning to be held back but if it bothers you, I'd suggest PM'ing a CA who has been around for your apprenticeship or a BD to simply ask.