Suck, no. Inferior? Almost always, yes.
Spider-Man kinda proves this, no?
Not that I would ever expect or "want" that to happen, but if RDR2 was exclusive to PS4 or PC, it probably would've been a better game in some way or another. It's just a fact that resources spent on developing for multiple SKUs are resources that could have been spent on enhancing the game in some way.
Other than that, and I really, really don't understand why I have to say this, is mentality. When you're creating a game that is for one platform, it should be distinct in some fashion. Maybe it's not the most creative game design ever, but it does it about as well as it can be done with a truthfully unique concept/look and cutting edge tech that puts the multiplatform stuff to shame (Horizon). Maybe it's not even meant to sell a crazy number of copies or even make money by itself (increasingly not even viable for the industry, but still), but it's meant to round out the platform for that extra couple million or so who want a quirkier game or less well trodden/mass market ground (Astrobot). Maybe it is meant to sell a mass number of copies so it MUST be an all around banger (God of War, Spider-Man, Uncharted, TLOU).
There are literally 20 years of history and statements from executives to back me up here. There are also almost 10 years of results from what happens when all of that gets thrown out the window.
Why are PS fans regurgitating Xbox fanboy copium? We know how this goes. Not even worth giving an inch.