Thanks so much, OP, for inviting our true judgy thoughts! I never want to hear anyone's 'be kind, virtue-signalling' thoughts. We all judge and this is an anonymous forum where virtue-signalling is a bit pointless!
I wear a bit of make-up. I'm an older woman but I have good skin - very few wrinkles because I've kept out of the sun. I would say I'm average looking but I make the best of what I've got with a bit of light foundation (almost 'tinted moisturiser'), blusher, greige eye shadow and a lipstick which wouldn't scare horses. Without anything I look washed out - so the absolute minimum is a quick blot of lipstick - it brings my whole face to life.
I'm vainer than I admit in real life. I think not-particularly-pretty people often are. If I looked like Margot Robbie I wouldn't bother with make-up and I'd go out in my gardening clothes. Yes, I care about how I appear to others and I want to be thought of as well-presented and stylish. You only get one life. Not bothered about being fashionable, though - that's different.
I have lots of friends who don't wear make-up and I've honestly never thought about how I feel about that until your question. I suppose I'd rather no make-up than the OTT, plastered on an inch thick look. I think heavy make-up is ageing, whether you're 14 or 84. To me, the most flattering look is to try and enhance what you've already got and minimise your problem areas.
I think a good haircut and stylish clothes (I don't mean fashionable, or formal, or expensive necessarily) are what's important and stop you looking as if you don't care about yourself or others - never a good message to be sending out!