this is why

pianotuna wrote:

My own personal belief is that no battery bank should be in the living quarters, unless there is a sealed box vented to outdoors, but others may do as they wish. After all, it is a free country.

As you say, it's a free country but since there is no off gassing, there really isn't a need to put them in exterior vented boxes.

https://www.rvia.org/news-insights/rv-industry-making-changes-address-growing-popularity-lithium-batteries

No one is going to force you to buy a lithium battery bank if you don't want one but you seem to be coming up with ever more creative justifications. If you don't want them, simply don't buy them. There are reasonable solutions.