This article unintentionally perfectly rebuts the idea of licensing: https://mcpmag.com/articles/2005/05/11/the-death-of-paper-mc...
Our industry is one where actual skills should and do matter, and much gatekeeping has been reduced.
Professional rote learning is great for mandarin jobs where you are working within a static prescribed framework (legal, accounting, building codes). It is terrible for jobs that require professional taste.
Tell me how you would create a license for a graphic designer or UX specialist.
I actually fail to understand idealists that believe that licensing might even work. Who are y'all?