I wall mounted a 65" TV this evening. It was a terrifying experience. Of 8 screws, I don't think I repeated the same combination of screw/bolt/anchor even once. One is overtly loose and only two are on a stud. I now get to spend all of my time waiting for a huge crash signifying that the whole thing has pulled loose leaving the TV, the wall, my wallet and my marriage in equal states of disrepair.
There are few such home-related things beyond changing light bulbs and knocking in a nail to hang a calendar on that I'm prepared to do, being largely cack-handed and clueless in these matters. Wall-mounting an expensive piece of AV equipment bigger than a Great Dane is definitely one I'd avoid. Damn foolish affair if you ask me.