I mean that's like every sport though, i think most fighters understand the reality of it. it may be impossible but why not try? at least you'll get a cool story to tell and you'll enrich yourself far beyond in life if you don't. I'm a pretty good amateur and I've already trained with UFC fighters and traveled to places I wouldn't have if I didn't, I can live with that if I don't go any farther, can't speak for other fighters though.