The almighty dollar wins out.
While we are vocal on this forum, chances are they sell FAR more trucks that dont have these issues or they are sold to people that just arent that in tune to the web, forums, etc. As long as it gets fixed under warranty they are happy. I think we would all be surprised at the number of people who just say eff it and trade in their truck for something new or just live with crappy treatment from RAM/FCA.
I think most (all?) of us on this forum are exceptions to the rule. We want our stuff to be perfect and last forever, but most of the world couldn't care less if their truck lasts 10 years because they only need to get through 2 or 3 before they "need" something new. Need in quotes because they didnt wear out what they had, they are just bored with it and are enamored by latest and greatest and of course the "cheap" financing for 8+ years.
Im on the side of you guys....crap fixes just make the trucks seem like crap. Welding the nuts is a perfect way for them to keep it together until its outside of warranty. I am sure they wold be more than happy to take even more of your hard earned money if you try to get them to align it and they see the nuts are welded.
I could understand if it is an urgent emergency, but this does not seem to be. And even if it were, there are many better alternatives like red loctite, some form of safety wire or tab to prevent extra movement from the nuts, etc. Red loctite is probably even easier than welding, their 16 year old oil change jockies could be assigned to it.