Actually, after reading the transcript several times now, I’m convinced it was a forgery. There are statements in it that the real Lennon never would have made. One giveaway: post-1973 info demonstrates “Can’t Buy Me Love”, although credited to Lennon-McCartney, was an almost 100% McCartney composition that Lennon never liked, and was actually jealous of - he almost certainly would not have referenced it in a letter as being a co-composition, and to make a point.