That's almost exactly what Lennon said except he acknowledged it was almost certainly conscious. He said he couldn't understand why Harrison did it given that it was so obvious and would be so easy to prove. He said all he would have had to do was make a few easy changes and he would have had no problems. Read Lennon's last interview in Playboy, that's where he talks about it.
It just seems so out of character for Harrison. And it wasn’t like he was hurting for money, either.
Strange stuff... you wonder what goes on in peoples’ minds sometime.