Perhaps they enjoy riding their bike, so that’s not a sacrifice. But giving up alcohol, friends, family, travelling constantly, verging on malnourished etc are all sacrifices.
I think this is a daft thread, I think everyone makes sacrifices. I could live off dole money, or work 3 days a week in a bike shop and do more riding, for that I’d sacrifice a nice flat, holidays and disposable income. Instead I sacrifice spare time to have a proper job! If you don’t see that as sacrifice then fair enough, but it’s naive to think that a pro athlete hasnt had to give up anything they love for their career.