That's literally not true. You think someone above-average suddenly becomes an elite model due to being a doctor?
Maybe 1 point extra and that's only true for girls who care. Which is some, not most.
I personally did by far the best during premed years. After graduating med school i noticed that a minority of girls care a bit, most do not. That's pretty consistent with most guys.
Not model but yes, guys become much more attractive. Considering the amount of dedication & work it takes to have a career as a physician (and other traditionally "difficult" fields) makes someone appear much more intelligent and desirable. The idea of dating someone who is a physician (or astrophysics phd, in a top law school, etc) is more appealing. Not to get too psychological but women care more about hypergamy, yet I've had a breakup over wanting to go into medicine bc it'd be "bad for our future family," so mostly girls will find it attractive.
Hookups are obviously much lower impact but more girls care than you'd expect, especially those not going into medicine themselves since it makes being a doctor seem way more impressive than it actually is. Although you are 10000% right when you say if someone wasn't getting any before, they're not gonna magically start