Here’s a bold statement; the RLA is not the problem it is the NMB. The NMB is a government entity and as such, has a mission statement, not a goal.
The pertinent part of the NMB’s mission statement is:

“The prompt and orderly resolution of disputes arising out of the negotiation of new or revised collective bargaining agreements.”

The NMB has morphed over the years to believe it has a goal. In this regard they believe their underlying goal is a successful dispute resolution, not to mention the underlying pressure they are under to facilitate it based on an internal supposed 97% success rate of late.
Just as valid as facilitating a resolution however they are tasked with the obligation to define and recognize an impasse.
They have just as much responsibility to declare an impasse when it in fact exists, as they do to help find resolution.
They do not allow strikes, they do not allow work stoppages, and they do not allow lockouts. They do not allow anything.
They are supposed to declare an impasse when one exists within “some” reasonable time frame (see the word prompt in their mission) although lately (the last 30 yrs or so) they’ve been able to stretch it out to “denial of binding arbitration” as an excuse for not having “done their job”, as they see it.
If they see a release to self help as a failure, they have a personal problem. At that point the process has been undermined. It’s supposed to be a valid part of the process.
The Unions and the airline workers themselves should rally to insist on the original intent.
And just as an FYI; once the NMB has released to self help, there are built in delay tactics including a PEB but in the end the ONLY entity that can order a striking union under the RLA back to work is Congress, not the president.

It’s not the RLA that is the problem; the NMB over the years has been contaminated by politics and allowed through acquiescence to assume more power and control than was originally intended. It was never intended to actually infringe on workers rights only to determine the impasse was not arbitrary.
Take back you rights or believe you don’t have any, it’s up to you.
Just remember , the only tactic older than divide and conquer is to have the other side believe they have lost before the battle has begun.
Good Luck