Cost and comfort, and wireless is not 100% reliable yet. They will probably release a wireless version in the future. Personally, I don't see the big deal, no cables would be better but just one is fine.
Well don't say I didn't warn ya.
Yes it's wireless but all the best games will be on the one made by the gaming company with decades of experience. You won't be getting anything like Astrobot or the new Horizon VR. Hell you'll be lucky to get anything like Half Life Alyx again judging by the imminent death of PCVR in favour of mobile/Quest style gaming. You have most of the PCVR people saying they're day one on PSVR2, and you already have a PS5 but no PCVR capable PC? Any big PC games will get ported over as they do now (but easier due to specs and hardware), and how expensive is a good VR capable GPU nowadays anyway? No brainer right? Seriously look into it!
To me this is really one of those situations where you could be gutted that you got a Quest instead of a PSVR2, but as it's you, the bitterness would be somewhat entertaining. So go for whatever one...