Because as of right now you are only getting a handful of PS games on PC at all. If you are willing to wait simply for the possibility of games that may or may not come to PC then that is up to you. I'm all for all games being on PC day one, but even then, as I said above, I'd play on both console and PC for the variety of experiences.
I've found nothing terrible about the design of the PS5. It does exactly what a console is supposed to do and does it well.
Until the 2000s console had 4 incentives against PC:
1. Privileged target platform ie. most of the quality games were only playable on consoles.
2. Power and optimisation: the way SoC were built made them x times more optimised than PC.
3. Design convenience: PC were and are still disgustingly ugly, but also particularly fat. Consoles were made by designer (although it peaked in late 90s/early 2000s) and were particularly compact compared to PC until the 7th generation.
4. System experience: playing on consoles where you just insert or download to boot into a standard, optimised version of the game (though it's less the case now), in the confort of your couch with a TV screen and a controller, always was a better experience than the hassle of a claustrophobic PC desk.
The PS5 lost the 3 first points of these incentives compared to PC.
1. Exclusives and libraries are meager, especially with Sony's not having done shit for BC unlike Xbox or Switch to counter emulation, but also it's strategy to exploit it's franchises and softwares on PC.
2. The whole software technology and tools lagging situation makes it very hard for publisher to exploit the PS5 capabilities in ways you can't yet on PC (save for Ratchet & Horizon), and by the time they do, the median GPU card will be as powerful or more, same for the integration of SSD fast-load.
3. The PS5 is the most terribly designed PS since the OG PS3. This is due to the fact that they wanted to milk and optimise so much juice out of the chip even breaking AMD's recommendations, that it concentrates too much heat in the same place, liquid metal wasn't enough and they had to put a HUGE distance between the chip and the memory stacks, and then HUGE heatsink and vent that account for half or more of the size of the console. Something bigger than a PS3 (which was a huge mistake and they corrected it with the slim and then the PS4) is a no go. Also it's not particularly aesthetical but fine.
4. So what is left is the system experience, which is fine on PS5, but nothing to make up for the 3 previous incentives.