As @BIWI says, the days of drilling and filling were shit, with dentists giving treatment for £££ (whether it was needed or not,) and some being bloody rude and obnoxious along with it. They would NEVER be questioned. Or critisized.
I also of a number of people, now around 52 to 65-ish who had teeth EXTRACTED, as many as 4 to 6 teeth, adult ones, (in the 1970s and 1980s,) as they were allegedly 'diseased.'
They swear down that there was nothing wrong with them. I believe them.
I have always said that I would have much better teeth if I had never gone to a dentist. I mean they're all right at first glance, and my smile is OK. Not a Hollywood style, but OK. But I only have 23 teeth left, and 3 of them are crowns, and 4 further ones are filled.
I used to have about another 8 filled but they are no longer filled teeth. They are either no longer there (after needing extracting,) because they turned to shit - because they were old fillings and the fillings broke down after 30 years or so.... OR they became crowns. I also had 3 or 4 teeth extracted in my teens. I still don't know why.
I never met a nice dentist til I was about 25-28 y.o. - mid 1990s. And that was a 26 year old woman. Freshly qualified. Since then, dentists have been OK, (indeed most are really quite affable,) and the injections and drilling etc are much less painful now. Indeed almost pain free. There is no need whatsoever to be scared now. But yeah, I do still find them a bit judgy, and find it a bloomin' cheek when the reasons for some peoples 'dental issues' are the fault of the dentists pre mid 1980s.
I have to say I hugely envy the generation after me - born after mid 1980s. My (adult) children, and their many friends and colleagues and acquaintances who are all born after mid 1980s too, all have good, nice, and pretty perfect teeth. Even the ones who were born with 'wonky' teeth had them corrected. And they hardly have any fillings. A few have one, many have none. And no extractions.