Personally; I manage my BO. If I can lift my shirt up, pull my head inside the shirt, and smell my own armpit odor, then I'm in need of some DO.

I've been using a Dove branded Spray-On (AP/)DO for Women and it's effective. By combining the acts of applying DO, then, changing clothes; I don't particularly sweat over much.

I Do Shower on an As-Needed Basis. That's saying that I do shower, without committing to any specific showering pattern or timing basis. If you try to imply I don't shower regularly you will look foolish.

If I stink, then it's either uncommonly hot and humid or I have not yet had the opportunity needed to shower. The hows and whys of this are not important; but generally if I choose not to shower, it's probably for a good reason.

I do suffer from some allergies and disabilities. I won't comment on what they are specifically, but they do exist, so I keep my fragrances light and unobtrusive; and I try to shower only when I can manage to handle doing so. I'm not going to uproot or upset my health, focus, peace or routine just to take a shower to please someone arbitrary; but I do allow the people whom I live with and love to remind me gently should I forget about addressing my BO in the chaos of life.

This isn't saying that I don't care. It's saying I'm imperfect, I have a life, and I do get overloaded sometimes.

I just don't like them. I like the natural body odors, even with women, I hate it when they cover that up with some heavy perfume.

For me, it was because my mountain bike gear was being washed on cold as heat screwed up the Eva foam in the knee pads and body armor. The jersey also got washed cold, so bacteria never got killed off. When it got hot, the heat would activate the smell, but it's hard to tell when you are going fast down a trail.

Once I started washing everything possible on hot, it stopped a lot of the smell.

I assume people are doing that with non-mtb clothing and getting similar BO results. So it's quite possible it's also not necessarily them, but their clothes.

I've noticed a lot of people don't do things the way I do them and it bothers me too!! Stomp your right foot with me if you agree!

I know I will let myself go when I'm in the midst of being deeply depressed, but then again I usually don't get much past my bed then. So that could be some of it.

I used to have a buddy that stank to high heaven, good dude overall, but damn did he smell. Turned out that he never washed his clothes. Once he got in the habit of doing that the problem resolved itself quickly.

The only other thing I can think of would be some Andrew Tate types going on about some made up benefits of 'natural male musk ' or something like that. Not sure if anyone is doing that, but I could see some men taking to that advice.

Never tried using deodorant. I didn't like the idea of using it. Showering has been enough for me. (I'm 32)
Nowadays I have a skin condition in my armpits so I don't think it would be wise to use that stuff anymore anyway.

I don't apply deodorant at all. Maybe before I know I'm about to be active, but even without it, it's fine, I shower after anyways.

I am not of those you are describing but in general: Some can have (afaik) genes that do not necessitate the use of deodorants.