Kalen, they absolutely have written and unwritten rules in NFL to protect the talent. Particularly, any questionable runs at the QB. And, what do you think the NHL league would have done to a Scott Stevens had he applied one of his famous knock-out crossing at mid-ice hits to a Wayne Gretzky? All sports I can think of, except these new cage fighting gladiator type games, protect their talent to some degree.
While golf is still not a contact sport, this extreme mentality of rough does not take into consideration the potential to the most vulnerable part of the talents bodies, the wrist and back. One of these days, Tiger will take that mightly swing from the rough that we all love to see and marvel at, but he will be one year older, a little more brittle, and then the catastrophe will strike. When you take those sort of mightly lashes, catastrophic musculo-skeletal failure is a serious potential, I think. I'd differ to Dr. Vostinak for more insight.