I'm not the person you replied to, but for a while I went to a franchise dentist practice. They had locations all over town and every time I went the dentist would be different. They messed up my teeth. They botched a root canal to the point the tooth couldn't be saved.
I think this was the place that brand new dentists would get jobs before starting their own practices.
Oh, I see! For some reason, I imagined thirty different dentists huddled around one chair lmao. I've never even heard of clinics with more than like 4 chairs. It didn't even occur to me that you could seal the operation up like that.
But you're right, it sounds horrible, so I'll take your advice!