Welcome to the site, Matan (To use your actual name respectfully).
Have you seen the cartoon Yellow Submarine?. The Nowhere Man is in that too. I think John was trying to say in the song Nowhere Man that we are all like that in some ways, in life, sometimes. Hence the lines in the song 'Doesn't have a point of view, knows what where he's going to, isn't he a bit like me and you?'. I don't think John is referring to himself as such.
I have to agree about the presence of Blue Meanies in this site.
I'm convinced that all they need is love!