RV Quality

I have been wanting to buy a RV. But the more I read about all of the different Classes and how many items need to be fixed. It seems to me that most if not all RV's are money pits. I understand things fall apart and some of that is just cosmetic. But if the big 3 Car Manufactures did that they would be out of Business. So why is it the RV Manufactures get away with crappy production? Isnt there anyone who holds them accountable? Am I reading to much into this? Is there anyone who doesnt have that many things go wrong with their unit? I realize that an RV needs maintenance. But after spending thousands of dollars. I would think that you should be able to Drive or pull it for at least a few years before having to spend thousands on getting it fixed. It wont stop me from getting one in the future. Just curious to know these things.