I think it's more likely that the 'infallibility' thing is a MEDIA CONCEPTION, especially since it's being dispensed by the MEDIA.
Some reporters read a TWITTER post that said "This Pope is Perfect for the Church", and they just took it from there.
When the pope speaks “ex cathedral” it is to settle a matter of faith. That is the case when he is infallable. In other cases, he is a man liable to error and sin, like the rest of us.