Well, I had a similar conversation with a co-worker and said something similar to guy at lunch. The co-worker didn't deny that bowling was sport, he was more of the type that just says "Whats the big deal? Anybody can bowl. I've seen people at the lanes bowl better than the guys on TV." He then said something like "Well, if I bowled as much as these guys I'd be that good too."
I said, "Sure, go for it. They have qualifying tournaments and you can win those and bowl on the tour." That lead to "well, if I had sponsors and people giving me balls and shoes and a place to practice...." Which of course if had to respond "well, I'm sure if you are that good then you won't have any problems getting a sponsor. Probably even easier since you are a minority and there aren't a lot of minorities on the tour." -- I don't even know if that's true, I was just trying to get the guy to shut up --
That lead to a discussion on how much you can make bowling, so I pointed him to the pba site and earnings list. After seeing that he decided it wasn't worth it - "hell, I make more than 75% of the people on that list!"