Definitely agree the product is what matters, but it (likely) helps to either be physically attractive or confident, or both, conveying to investors, customers and whomever else to offer their time and attention to listen to you.
I think it's more that it's generally not as common a topic in SF, where aesthetics don't seem to matter as much. This might be different with founders and tech workers in places like NYC, but in SF it definitely doesn't seem that common.
Although not entirely appearance related, Slow Ventures put out books and seminars to help founders not only look and dress better, but also be more intentionally professional, that seems to suggest there's a drift away from startup swag to sport coats.
That got me wondering if aesthetics like hair transplants, breast implants, and similar were as common in tech as they seem to be in Vegas, Miami, or LA, but that it's just not discussed as much.
In addition to all of the stuff insurance denies, they also won't pay for anything considered elective care (and that's a pretty broad brush). There are ways around this but that's neither here nor there for this discussion.
Like the other commenter suggested, medical tourism is a viable answer. Most Americans have probably heard of Turkey for hair transplants, but the truth is that certain countries specialize in specific procedures, and are the BEST in the world at performing them, and with the best outcomes.
I've done several procedures abroad and saved 70-80% vs the US cost, and that's including the travel and vacation portion. Yes, medicine costs a lot, but most people are ignorant to where most of that money is going to pay for, and how expensive the "system" makes things in the US.