GP I have seen your skin in other photos (outdoors, and taken by your DH) - it is fabulous.
Although I myself wear makeup most days, I caution you to think twice before messing with perfection. As Krishni said, makeup takes a lot of time and experimentation, and if it's slightly off it can look less fab than bare skin (your pics look good, but pics can fail to show makeup details). At worst, skin problems you never had can be triggered. And you have to take it off every night...
Do you actually need to look more professional? Would you get more patients/ a promotion? I think you do look professional anyway, and I agree with Amy, do your job well (as you do) and that is where the opinions will come from.
I wear makeup because I have acne and acne hyperpigmentation, and because there are things in my face I like to correct and/or enhance. In my mid twenties I wandered into Mecca Cosmetica, really down that day. The SA asked me if she could help me. I said "Make me look pretty".
And she did. I experienced the power of makeup, and the power of being understood and uplifted by a quiet, wise, compassionate SA - there was almost a sisterhood thing about it.
I also actually enjoy makeup; the textures, the categories, the colours, finishes, the Search for the Holy Grail.
But I do NOT think it's compulsory.
Do it if you enjoy it. Don't do it (or buy into assumptions that everyone "needs" it) if you don't feel inclined that way.
And FWIW I think the argument is a crock. I see plenty of women who don't inspire my respect, wearing makeup; some who provoke my discomfort and compassion because they are having a makeup malfunction (unblended foundation, lipstick on teeth); and finally, some who either appear to wear no makeup or clearly aren't, who look poised, put-together, and powerful.