And if Sony handled it like you say Audible did, there'd probably be fewer complaints.
So far as I see it, it shouldn't matter whether or not Sony retains the rights to sell licenses for some content, unless they explicitly stated that at the point of sale. I never had a PlayStation account, so I don't know how that process works. I know that on Amazon, it says RENT or BUY. If Amazon told me it couldn't play something in my library of purchased things because of licensing, I would pitch a fit and take it to... hmmm... the FTC I think. False advertising for renting me something and calling it a purchase.
I'm rarely in favor of government intervention in the markets, but this would be a legitimate place. This is an issue that needs to be cleared up. It creates too much uncertainty. People may need to sue Sony to get it going. Or, a federal legislator seeing that their copy of their favorite movie is gone.