Because it's a pain in the butt. Not a huge pain in the butt, but a continuing, simple to fix, shouldn't have been there in the first place pain in the butt. Unless you're willing to concede that Sony programmers and engineers are just dumber than Nintendo and MS programmers and engineers, then there's no good excuse for it.
It didn't stop me from buying a PS3 or playing it, but it does cause frustration every time it happens. Because it should have never been set up like that. There's no reasonable rational for it other than a) bad bluetooth implmentation or b) poor UI design. Same goes for the damn EULAs.
Every company but Sony got it close to right, so why does Sony get a free pass, exactly? I complain about the iffy controls on the Wii (especially with a chair eight feet away from the screen), the Wii's inability to autoupdate itself even though that was supposed to be the entire point of 24Connect. I complain about the 360's atrocious failure rate and sometimes about their ass-raping Live policies, so again, why does Sony get a free ride?
My suggestion? If you don't like hearing people discuss the negatives of the consoles they own, you might want to stay out of threads that are clearly not going to be positive.