I think that is one of the reasons, but the main one is probably interference from controllers.
When they added Bluetooth audio to the original switch, they had a limit on the number of controllers you could have connected at the same time (I think it was like two?). So it’s probably the same for switch 2, they just don’t want to deal with it
Have you given the CachyOS kernel a try? It’s got some of the Clear Linux patches and some other custom patches, and it might have slightly better performance than the others you’ve listed here
Although expect to only really see any noticeable improvements in games or benchmarks and the like