The thorny issue is that your 3 examples might reduce that girl's chances on the dating market, so it might even be reasonable for her relatives to attempt to support her in obtaining a high quality partner.

I'd say the critical part wrt suicides is not that people are competing for attention from the opposite sex, because that has been around for a million years. The critical new aspect is that people are now grossly underestimating their relative standing. And that's because social media makes the one pretty outlier actress from the other side of the globe feel personal and acessible, which tricks us into treating them like a valid comparison point even though most high school girls will never need to compete against a Hollywood actress on looks, because the latter one is unavailable to all of her male classmates anyway.