Are you like that it as well? That was from someone I know IRL.
Yeap I am exactly like that. It doesn't bother me if I spend days like this.
The thing is that long ago I was explaining the root of this behaviour to some ENFPs and I got reaction that is pretty similar to your reaction to that person.
Also my ENFP mother as well thinks something similar about this.
But this is a story for one of those Ni or ENFP/INTJ threads.
Also being extraverted doesn't mean you seek interaction with people. For T-type extraverts I've noticed their extraversion is often directed at environment that may not include people. I've known an ENTP who by commonly accepted definition would be a total introvert. His extraversion was directed at electronics, gadgets, his computers, he was often buying some new gadget, upgrading his computer, cracking some programs, buying various other kind of electronics, reading news on new products that came out, selling his old stuff and juggling his money in hopes to afford a new shiny electronic toy. This is what he spend 90% of his free time on. He only interacted with people from work really and had very few friends. It is usually the F-type extraverts who fits the common definition of extraversion i.e. socializing, partying, and wanting to be with people.