That makes sense; insurance companies usually don't pay for elective surgeries like that, and paying cash for [boob job/face lift/sex change/whatever] in the US would be way more than the average person could afford. Not sure how much that stuff goes for down in the fine country of Mexico, but I'm guessing it's way less.
It is worth considering how well such plastic surgeries can do, cheaper does not always mean better. Moreover, the appearance, the face is what we see every time we communicate with a person. I dоn't want to say that there are bad specialists and they will definitely make it worse, but we need to think about it, need to weigh the pros and cons.
Basic medical needs should be covered by medical insurance, this should eliminate the need to look for cheaper treatment. And everything related to plastic surgery is the business of every person and, in my opinion, has nothing to do with health, only in some cases.