I live in a very plastic surgery heavy area. It’s rough it see. Instinctually we as human beings can tell when we’re looking at something unnatural in a face. At least if you’re thinking about young women, I bet that’s what you’re seeing. But young men do it too.
I think Botox and fillers age the face. Especially young people who are not paying top dollar for it. Their injectors are probably cheap and inexperienced.