Spoken like guys who will never have a chance to have a women that beautiful!
Well it depends how you define beauty. For some it is almost entirely the facial features, which can be rather suspect on some of these 'fitness' girls. However, you said 'have some respect' because a guy made some sexual innuendos. These women's careers depend solely on them being reasonably sexually attractive..hence they get some fake tits and squeeze themselves into a bikini. They use their supposed sex appeal for their job - it's not wildly different to being a whore, except they don't get fucked - so they will get lewd comments.
The moral here: Don't wear skimpy underwear and have fake tits if you want to be as unnoticed as a shrouded Muslim woman.
Also , you talk about respect..have some respect for your body. STOP injecting illegal and harmful drug cocktails.