"They are not of the same quality as your stick built home, they are better!"
Using your logic a mobile home is better than a stick built because it made it from the factory to a lot going 70 MPH. Don't think that logic holds water.
True the RVs are built to take the highway, but some do and some don't make it...read the threads. Finish materials quality, along with workmanship is almost always only fair to average at best. RV quality is very comparable to a mobile home IMHO. And not a top grade MH.