Well, I think that was what he was saying basically but I also think in the context of the times and how he felt (I get the sense Lennon was a pretty pissed off guy at that point in time, at the world, the Beatles, in general) I think he was really being very sarcastic and nasty. So, I think the word "fuck" while not there physically is certainly there in spirit and more than once...like "fuck you if that is where you're coming from nobody is going to fuck you anyhow!"...in the context of summer of love, all of the cultural upheaval of the moment, some bad blood among the Beatles and the hippy dippy stuff which I don't think Lennon really bought into as a solution to anything at that point...I think that's his nasty side coming out and the songs of the White Album do have sort of nasty sarcastic streak. So I think you're not off in what he was saying but maybe just off in how nasty he meant it to be. I think it was a way of getting "fuck" in there without actually saying the word.