This is what you think today. Tomorrow, when new apps are developed by FB via blockchain, you'd be like that seemed so obvious in the hindsight. We are early on blockchain - there are a lot of hidden use cases and apps waiting to be built.
Not much different from no use cases, at least from where I'm standing.
People compare this to the early 90s of the internet, except even then early internet was EXTREMELY useful, even with the limited access and content.
It would seem we have come full circle.