I get it that those who do not have large breasts that this kind of bra talk may sound a little weird. But for those of use who have been blessed to be well endowed with mass and/or density of breast tissue, bras and bra types and styles become important, as it is for many women and for the same reasons. Our breast tissue is not that dissimilar to theirs. Not all of us may be able to express, but for many, the plumbing is the same whether we can or not and many of the issues are the same with the same solutions.
For me, being a DD(E)/DDD(F) cup in a 38 band, I can't hide my chest anymore and binding stopped being an option many, many years ago. I can downplay it with the type and style of bra, but in the end, I have two little mountains on my chest that have a mind of their own if I don't do something to corral them. And like many women, a bra has become a part of my daily wardrobe for that reason. My fear of being uncomfortable is far greater than the fear of being detected. Discomfort is a powerful motivator.
So I wear a bra and deal with all the things that wearing a bra brings from price, to style, support, lift, shape, containment, care, comfort, appearance, judgement. Same as women. It's what you do if you have breasts and wear a bra for them in our society. It's the language of the subject.