Correct, the limitations are there to differentiate between models. Of course Apple, Nikon, whomever must differentiate between models. In this case one way of making the MBPs more pro is by giving them the ability to drive multiple displays. Another way is by allowing more RAM in MBPs, more TB ports, etc.; each added stronger characteristic making the MBPs more pro, not just a marketing term with zero meaning.
Nothing empty about it, the MBPs are more pro. In my case Apple's product segmentation worked as planned by Apple. The M2 MBA is so strong that I would have ordered one for my pro workflow - - except for its inability to drive 3 external displays. So I wait for the pricier M2 MBPs, instead of me (inappropriately) force-fitting Apple's lowest end laptop into my pro workflow just because Apple built such a sweet chip and sweet new MBA so much less expensive than a loaded MBP.