Quite many popular slim girls with huge tits have got them reduced. Busty Buffy aka Lucie Wild, Linsey Dawn McKenzie, Juicyjade aka Lolosavo, ...
I also have two friends who have got the reduction. Mostly it was because of back and neck pain, and carrying boobs like that in a small frame it sure will be something that defines you visually in public.
We guys with big dicks, we can hide it usually. And if we are muscular we have done it on purpose if it shows up too much. I kind of understand the ladies who did the reduction. For example Lolosavo got into a law school and told she is worried that she wouldn't be convincing enough as an attorney of law if she had huge tits.