RV build quality isn't just a worker issue.
In boom times (like we're currently experiencing), most RV manufacturers aren't particularly concerned about the quality of their products. There are plenty of first-time RV buyers who aren't knowledgeable or experienced about what makes a quality product, and they're more likely to accept shoddy quality when inventory is scarce.
As the automotive industry already knows, there are ways of designing products that make their assembled quality largely independent of the quality of the people doing the assembling.
However, doing so usually requires a heavy investment in R&D, specialized tooling, etc. - Things your typical RV manufacturer isn't interested in paying for.
Right now, for most of them, cheap and shoddy is good enough.
