It's also hilariously wrong. It essentially argues, implicitly, that those who don't communicate with other humans are missing out on the "most important thing in life" and cannot form a self-identity.
Human beings require interaction with other human beings to identify the self. It is impossible to live without others. Read up on solitary confinement sometime - enough time without human companionship will drive any human being (except the schizoaffective) completely insane.
Yes? That's completely true.
> Literally the only important thing in life, the basis of all value, the formation of self-identity, comes from communication with other human beings.
I think you're mistaking their sarcasm for sincerity... especially considering the emphasis on self-identity ironically juxtaposed as originating from a decidedly non-self activity, which has all the hallmarks of being intentional...
On the other hand, reading their other content leads one to believe that they may, in fact, be serious... hmm...