Score! You landed a surgeon. Haha, jk.
DH's and my siblings are all doctors, as well as a number of cousins and uncles. (We are the FIRE-driven slackers in the family.) Yes, being married to a doctor/surgeon is hard as a lot of the housework and childcare may fall to you. Surgeon hospital hours are crazy, but clinic hours are a lot more flexible. I have a friend who is a breast surgeon. All her surgeries are scheduled 6 months+ in advance, and she blocks off Tuesday mornings and Thursday mornings off for tennis. Surgeon pay also allows financial flexibility to splurge on anti-mustachian things like a nanny/au pair which can help give you (the at-home spouse) some much needed "me" time. The doctors I know aren't very mustachian, but they have happy lives, and usually have some sort of part-time childcare/cook helper. Their percentage of saving isn't as high as mine, but they are saving much higher raw dollar amounts. ...they just tend to blow it all in big chunks on boats or million dollar+ lake houses, which I happily use, so no complaints.
I can see why a mustachian would appeal to a surgeon. You can help rein in the social pressures to keep up with the joneses in doctor world, and help budget to get those loans paid off quickly. You should talk with her more about this long-term life philosophy type stuff. Maybe figure out what her ideal life would be, her thoughts on children, retirement, housework sharing, etc., and see if they line up with your own. As a relatively more career driven/less-domestic female, I am so grateful for my Southern husband. He is awesome at home maintenance and loves spending time with the kids fishing and outdoors. He has no psychological hangups about making less, and his goal is to retire ASAP and be a SAHP. We do split the housework, and I usually take over the kids once I get home to give him some free time to relax. It's a perfect dynamic.