Of course we can go back to business as usual post-PRISM, because PRISM turned out to be absolutely nothing. It's a mundane, boring data storage & analysis system for data obtained through FISA requests about specific individuals. It's not a data dump from major tech companies, it's not a warrant-less spy program, etc...
You don't have a clue what it is. What you should realize, though is that a lot of people are up in arms about this. Do you think you're smarter than all of them? From this post alone, I see a resounding no.
Oh, so one of the people involved in this immoral, illegal spying program says it's not that bad? Well never mind then! I guess it must all be ok. No oversight needed.