Perhaps I'm in the minority, but I can't say I find "Instagram Face" to be attractive at all. It looks ridiculously unnatural, and evokes the same feeling as those ultra-SEO'd mostly contentless sites that flood search results.
I wonder if that's true for people who end up spending more time on Instagram than elsewhere, and start finding the IG Face to be more "natural" and get weirded out when they see people with wrinkles and stuff. I'm assuming here that "natural" is a result of what you (and I, since I feel similarly) are just used to.
What's more, it's not just visual traits either. No, I suspect a lot of people feel an American accent is the 'norm' now as well, in part due to how much popular media originates in the US (and how many internet influencers seem to be from there).
And there are definitely quite a few stories of people assuming their own country/culture works like the US/Europe/wherever based on what media they watch and who they follow online.
Could be interesting to see a study about this stuff.