Probably because... let me take a wild guess here ( ), the console hasn't been out for a year yet? Would be quite "remarkable" if it had a fail rate problem this soon into its lifespan.
Ok, so how soon is it supposed to start failing because of this vapor cooling system? And if vapor cooling is such a lifespan killer, how come nobody is discussing this issue anywhere? I heard a million things about the Xbox One X but nothing so far about the machine dying sooner than normal due to the vapor cooling implementation.