I could say the same to you in other arguments. This is a self-biographical piece, just as it would be if it were art or music, I suppose because the medium is a "comic" then it's fictional.
Art and music can tell fictional stories too, they may not be auto-biographical, just as I may assume it to be so, as I know nothing about the author. I also genuinely only read the main comic panels as (and I admit this is due to my own failing) it being a comic, i genuinely don't read the header. I sincerely thought it was fictional biography, in order to enhance the fiction. I've already conceded failure in not realising that it's an auto-biography and personal opinion that it could be fiction adressing the public that way.
I did not come here to argue semantics and pragmatics.
I merely stand by my point that it being fictional and biographical, does not make a person a liar. No more than "this film is based on real events". and is just a medium to enhance it.