Let me explain it like this. How many people ran out to buy an Xbox after Hi-Fi Rush, Pentiment, Grounded and Sea of Thieves were released on PlayStation? None? Damn! Well surely Forza Horizon 5 will do it.
Doesn't work for Xbox so don't see why it would work for PlayStation.
The only way it could work for PlayStation is if Sony relegated non-PlayStation systems to getting remaster compilations of prior titles, like the old Sly Cooper games, with modern QOL improvements and such. But preferably, would coincide with an announcement of a new PS5-exclusive Sly Cooper game arriving 1-2 years after such a multiplatform release of the old games via collection.
Another example would be with Until Dawn. Now, had SIE already both released a good stable of exclusives for PS5 AND they were still exclusive to the platform up to this point, then a Day 1 for Until Dawn to PS5 & PC would be acceptable. You can do that every once in a while IMO, if your main platform still has enough genuine exclusives to make that the case. But that's not the case with PS5, and yes I am talking WRT 1P exclusives (3P exclusives are always going to be timed and in some cases just a few months to maybe a year).
However, given the current strategy it would've been optimal to at least have it be a timed PS5 exclusive for a year and then release the PC version. That way you at least encourage some double-dipping. Additionally that strategy would've made something like Until Dawn remake better suited for driving value towards the PS5 Pro near its launch. Instead anyone who's on the fence between getting a Pro or upgrading their PC has one less reason to consider the former knowing they can likely get the best-performing version of a game like Until Dawn on PC Day 1.
And no, I'm not saying Until Dawn is a "killer app" that's going to on its own make people go buy a PS5 Pro or upgrade their PC. It is more about a number of games like it, and a number of those games being console & PC Day 1 just weakens the value proposition of a PS5 Pro bit by bit, before it's even released. But it's most egregious with SIE because the iffy cadence in porting releases from console to PC is clearly evident with their own games, and they are the platform holder of PlayStation. Ultimately it's their games that should be adding valuation to the platform via content differentiation (exclusivity), but it's hard to maximize that if you've got a stable of games releasing Day 1 on PC, some going Day 1 on other consoles, and shortening windows from PS to PC for marquee titles.
Not to mention, the types of games being organized into the porting timeframes is just all over the place; there either isn't a clear (i.e non-conflicting) vision, or the vision doesn't seem fully thought out. At least IMHO.
Explain how.