I Just started Jiu Jitsu a few months ago, I have wrestled since the 3rd grade and I believe it is one of "if not the best" bases to bring into any sort of grappling sport. Not only does it improve a person's work ethic, but it improves a person's positioning, hip movement etc... etc...
While I can see where some people come from, watching a top notch wrestler take a guy down and lay on him for 15 Minutes or more is extremely boring (sometimes even for me) and I love wrestling, but you do have to admit that for a person, lets just say in the UFC to go in there with top level competitors and completely take them out of there game whatever it may be. Jiu Jitsu, Boxing, Muay Thai, Judo etc..... is pretty damn impressive if you ask me, but again that is just me and we all have our own opinions.
But anyways, I could see where you are all coming from! I would hate to have a wrestler come in and just take me down all day and lay on me that would suck! but don't take it out on us wrestlers that come in dying to learn the 10th planet game or just the JJ game. everyday I am in the gym I can't wait to learn something new! last thing I want to do is come in take someone down and lay on them all night.