If there's going to be less consoles available regardless, if the yield info is mostly an excuse and only a minimal concern, it could also be SNY is just going to charge more than they were planning to prior.
A $499 PS5 won't sell as fast as a $399 or $449 would. No point in having a bunch of extra inventory lying around. No chance you're going to explain that's the legit reason for the production downgrade either.