Not the same thing. PA gives you access to a game across console(s) (XBO/Series) and PC, as well as include cross-save, cross-progression for those games. Having access across console and PC is not exactly the same as being able to run a copy of Zelda on Switch 1 and Switch 2. Using GT7 as an example, for PS4 standard owners, they had to either pay a small fee to get the upgrade or buy the deluxe 25th anniversary edition, which launched at $90, to get dual ownership. If someone just bought the PS5 standard edition, they would not have retroactive access to the PS4 version.
Dual ownership across console and PC. Someone who might not get a future Xbox Magnus console can still reap the benefit of the PC copy on any relevant PC hardware.