It will not change until the dealerships tell the manufactures that customers are coming onto the lots, looking at the tires, and walking away without looking inside the units.
Cheap China tires will ruin the 'fun' of RVing, as everyone will start to think that trailers are dangerous, because they blow out tires and flip over at freeway speeds.
Once the dealerships call the manufactures and insist on better tires, things will turn around. However it is in some dealers minds that "That customer will be back to buy upgraded tires soon" and that is poor sighted business plan, to send out customers with poor tires in the hope that they will soon return for new ones.
Fred.