Personally, I find it very surprising most hackers have such a disdain for physical beauty, given the huge ROI for every $ invested - reportedly about 1,000x for Elon Musk personal worth.
Still, only a few CEO seems to have taken action to maximize their appearance, and mostly against their premature baldness. Even that is kind of taboo - while studying before an interview is not, even if it will certainly have a much lower ROI.
Why not hack your appearance?
There are many scientific studies documenting all that, but we ignore them. For an example of all the known variables, check for ex table 1 of the following for "Zero-order Pearson’s correlations between facial appearance and health, with the corresponding p-values and sample sizes":
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290736/
If you want more example for a given variable, for example the effect of adiposity (we know it's quadratic), read one of the original papers:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308207/
All this is well known now, as the first study was about 22 years ago:
Perrett, D. I., Lee, K. J., Penton-Voak, I., Rowland, D., Yoshikawa, S., Burt, D. M., … Akamatsu, S. (1998). Effects of sexual dimorphism on facial attractiveness. Nature, 394(6696), 884–887. doi:10.1038/29772
So why do we keep ignoring it, while focusing on other signals like which search engine (or operating systen) you use?