I just don't trust the typical manufacturer's idea of a tv mount, ive seen plenty of crappy workmanship in other areas of various trailers over the years, why would they do a tv mount any better?
find two studs, cut and fit a piece of decent plywood that fastens to the two studs and use that.
remember that what looks good and works in the showroom wont look so good after a 100 miles of highway travel
the panelling in rv's comes off remarkably easily, done it lots and it goes back on with a few more staples. this makes it easy to check and add more/better material that will be hidden. That's exactly what I will be doing in the next couple of days to our new tt. Even the "studs" in the walls are suspect imho, some manufacturers don't bother nailing/stapling the studs to the top and bottom plates, the're held together with the panelling staples!!
I've renovated/repaired several trailers, generally the construction methods are appalling and shinier glitzier models are no different