You say you wouldn't mind paying a little more if the quality were higher and no issues would be had. In the grand scheme of things, you are in the minority in your thinking. The majority of people now days have the idea that they need to have everything they want so sacrificing a little quality...
Making money is part of it but you have to remember people want cheap. With all the off-brand knock offs the cost gap gets too great if you start adding in the cost of all the upgrade parts. If all r/c's came off the shelf in bullet proof form they would be cost prohibitive to many and the hobby...