How often do we worry about blowouts when driving our cars? That should also be the case for RVs. Tires should be properly inflated and the load should be well within the rating tire capacity. Cars tend to run up higher mileage and tires are going to wear out and be replaced. Many RVs are not used that much and some owners do not want to replace old tires that still have a lot of tread.
I don't need a DRW car and should not need a DRW truck for the loads I carry. If you worry about a blowout, consider that a blowout on a front tire is likely to be much worse than for a rear tire. Again, use good tires, properly maintained and inflated and replaced roughly every 5-7 years.