So many adverts made by ‘western’ companies, especially anything related to toothpaste/other dental stuff, have the presenter smile with some uniform, white flat teeth. I feel like they look sort of uncanny, they just seem off-putting to me. Most people have decently flat teeth but they aren’t that fake-looking white. I have pointy canines/pre molars that definitely look completely different to the ‘perfect teeth’.
Same reason that some people have spray tans or workout until their hearts can’t take it anymore. It’s seen as attractive in the culture.