Ehmm that is as included in the box as the single player experience.
PSN as a service and PS3 as a gameplaying/BR player are 2 separate things in my view. I bought mine primarily as a game player with the added functionality of BR. If it stops doing either of those because I "chose" not to update the FW, I'd be very upset at Sony.
The fact that it is included in the box is an option that no one has to utilize. You aren't forced to utilize PSN if you just want to play games or watch BR.