I have to say that really no one is wearing makeup for themselves. It doesn't make sense at all as a claim. You can't see your own face!
That's not true though, is it? It probably was true in the past - certainly pre-industrialisation, where poorer women may not have seen their faces at all, except reflected in a pail of water or something. But these days, we are surrounded by mirrors - if I go into the loos at work, the wall above the basins is all mirror. There are plate glass windows everywhere, polished metals - and cameras everywhere. This is the selfie (hmm, phone autocorrected that to selfish...) generation - when I was a teenager, photos were on film, and you had to wait for them to be developed. Now it's instant, everywhere.
I grew up swimming several times a week, and I just couldn't be bothered to get into make-up and having it run down my face in the pool and spend time reapplying it, so I just never developed the habit.
We also didn't have a TV til I was 14, which I suspect may have also made some difference, fewer images of "perfect" women. But it also meant I was different anyway, as I never did see what everyone else watched last night, so I grew up feeling I didn't conform through no fault of my own, and clearly the world did not end, so nor will it if I don't conform in other ways.
I work in an area of IT where jeans and t-shirt is the norm, but even if I'm dressing up for an interview, I don't wear make-up. I do wear lip balm, because I am prone to chapped lips, and as I get older, I'm finding more need of moisturiser on my face. I have been through phases of wearing all sorts of nail polish, though not recently. I do get my eyebrows threaded about once a quarter with remedial tweezing in between. Never shaved my legs, but I do occasionally wax them for the masochistic pleasure of ripping the strips off. I have very fine leg hair, so unless you're really up close, you can't tell, and I wonder if my laissez-faire attitude to not bothering would be different if I were hirer. I do shave my armpits, but not so frequently these days, because my skin doesn't take as well to it as it once did.
I do sometimes notice me in the mirror and think I look as though I only had 4 hours sleep, but often that's because I did only have 4 hours sleep. I know that probably concealer or foundation or whatever would even out my skin tone and the thread veins (genetics), but I can't be bothered to learn, and however I looked, it wouldn't feel like me. Not dying my hair, either.
I'm sure there will be some people who judge me for how I look, but I expect they will live with it.