The situation looks to me like a copy of what happened after the "TouchID cycle". From the original iPhone to the 8, not much has changed on the front. It was a similar iPhone. This great cycle of 8 models ended with a single iPhone 8, without a Plus variant in favor of a new opening in design, which began with the X. Perhaps Apple wants to do exactly the same now. The regular iPhone 17 and Pro variants will end the long cycle of FaceID phones (I'm not saying that FaceID will disappear, but it's about tidying up), and the alleged Slim will be the new X, something we don't expect, a new opening that will start another cycle of 8-9 models. Then Apple can indeed position it much higher than the Pro.
On the other hand, the company is headed by Tim Cook - a great manager, excellent at spotting mistakes and development dead ends (thanks Tim for the Apple Watch, which turned towards health/sports and for the workhorse MacBook M1 14"), but without an ounce of vision. That's why it may not have been a new X, but something a little different and very thickly covered with marketing icing.