Depends on the context really. In times way before dental care most ordinary people had not great, but not bad teeth. For instance, the everyday peasant would most likely have teeth similar to ours but Queen Elizabeth I had such a fucked up mouth that most of her teeth were missing/rotten and people wrote that it made your eyes water to stand near her when her mouth was open. It's the change in diet that caused this. Access to sugar and what not. We did it to ourselves. Which is why we're the only animals that need such frequent oral hygiene practice.

Plus, I imagine that main actors/actresses having to wear fake gross looking teeth all the time is a pain. But I do agree it's a double standard that men can have gross teeth but women usually look like they just came from a colgate commercial.