The warranty is with the manufacturer not the dealer!

Manufacturers have no leverage with the dealers.
They slap the things together as fast as possible and send them out.
If they wanted to improve quality they would pay workers by the hour not by the piece.
The dealers know more than anyone, how poorly the units can be assembled and are not willing to take full responsibility for quality control.
There is also a cumbersome approval process that deliberately slows the warranty claim.
There is also newbie consumers who believe everything is "Hunky Dory" and don't understand the need to conduct a very thorough PDI.
They don't know once you pull off the lot it's all yours.
The root of the problem lies with the manufactures. They build the product and set the warranty policies.
The dealer merely distributes the units via loose network, there are not franchise agreements like the auto industry.
The warranty doesn't last forever at some point the consumer will have to take care of the unit.
Ultimately RV'ing is a DIYers game. Taking your house down the road will always be a challenge and require DIY skills,
Initially the warranty does give you piece of mind and protection against catastrophic failures, however to have a successful RV experience an owner will need DIY skills when issues are encountered or a large wallet and patience to take care of those issues. Warranty is a small part of the equation in the long run.