I grew up with working class guys and my adult life with tech folks. I know of very few guys who want woman to dress more modestly and they are all a type of uber nerd and I think in all cases were super religious as well. Then again none of them would wear a tie without it being mandatory. Heck I barely tolerate wearing clothes in general except to protect from inclement weather.
Actually sexualization- as opposed to attraction- to breasts isn’t natural, which is wild. There are plenty of cultures where breasts aren’t sexualized, especially near the equator in some traditional cultures where women go topless.
Also as a lesbian in the US who definitely has internalized sexualizing boobs, I don’t find it at all distracting when someone isn’t wearing a bra. Maybe it is just that I see boobs in non-sexual contexts so it only is sexualized within a sexual context? That might be useful if you’re interested in unlearning this habit.