Great post. I agree with most of what you stated with the exception of point #2. Pilots at some of the legacy airlines do have a CRNA equivalent and it is the regional pilot. Even though they may work under a very similar company name, the mainline pilot and the regional pilot are part of two entirely separate employee groups (and the regional pilot on average has far less flying experience). One of the major objectives of the mainline carrier’s union is to protect their flying (scope) from being given away to the regional pilots. “Scope” is a very, very big deal for mainline pilots at an airline like United, but is likely a non factor for pilots at Southwest (a company which doesn’t have regional pilots).
I’m married to an airline pilot also.