I really think most college wrestlers (in particular the highly skilled ones) probably have quite a desire to try their hand in MMA. Considering in every MMA division currently I could name you at least 5 stars who started off as wrestlers, I don't blame them. Plus it goes hand in hand with their lifestyle as a wrestler with all the training, weight cutting, ect
For *most* of those types of guys they look at MMA as the ultimate baddy mcbadass sport, and well, we all know the social stigmas that surround pro wrestling, especially these days.
edit: And while both are bad for your health, you can't help but think of the laundry list of wrestlers who were dead before the age of 40 when considering which is the rougher working environment. IMO no pro athlete (and I do consider them pro athletes) have it as rough as professional wrestlers.