system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] How come everybody in the federation isn’t super model gorgeous?

We know that the Federation has the technology for incredible plastic surgery; they can make someone appear to be another race quickly, easily and painlessly, and easily reverse it. In DS9 “Apocalypse Rising” Dr Bashir states that he can give Odo “any face you like”. We also know their food is magically super nutritious (Troi references this in TNG, not sure what episode but she’s talking about how she wants “real chocolate” not the replicated nutritious stuff). 
So why are there still uggos in the federation? Granted, most of the people we see are pretty good looking, but not everyone is as hot as they could be. Is there some federation value against enhancing your looks? People wear makeup. Of course, it’s entirely possible many people DO get plastic surgery; still, I wonder if there’s some social taboo against it.

Edit: People seem to agree that The Federation doesn’t judge people based on looks. Going off of that, do we think plastic surgery is even available? If I went to a doctor asking to get a facelift, would they look at me like I was a crazy eccentric, a degenerate, old fashioned, criminally insane? Or what?

Edit 2: y’all I know plastic surgery EXISTS in Star Trek, but can an average citizen use it to make themselves look better (whatever that means to them)?
gpt
Maybe the idea of a person being expressly "Perfect" was soured as a result of the Eugenics Wars, where scientists attempted to make humanity superior through selective breeding and genetic engineering.