Still, immutability alone isn't attractive enough for some people.
I personally don't see a problem with allowing people to remove their account and data from the chain (not sure of its current doability), the users should have the ultimate control over the things they share, that's the selling point, immutability is good but only when it comes to protecting your data against censorship, if immutability means that your data will be taken in hostage by the blockchain forever, some people might not like the idea. The concept is not perfect, but it's something to think about.