Ah man, see that’s peculiar to me because I spoke with a few sergeants major that spent the majority of their careers in regiment, one of which ran RIP and the other did serve as cadre as Ranger school at one point, and THEY told me that you need to try and graduate Ranger school if you’re E-5 or higher... ESPECIALLY if you serve in a leadership position, but not all PFCs and SPCs in regiment are Ranger school grads.
Also, I know several people in regiment right now and I can call and confirm. So I think you’re confused.
Also: SFAS isn’t RIP or RASP. They are two different organizations with two different mission sets, so don’t compare them here. Getting SELECTED at SFAS puts you in the pipeline for Q course, and completion of the Q course gets you the SF qualification.
Again, not all rangers have been to Ranger school, and going to Ranger school does not make you a Ranger.