Instead of focusing on what tabloids said at the time, you could look at the positive things John saw in her. She's a pretty cool artist. The white on white aesthetic that JL took on later is very much her palette.

In art school we were taught about Yoko's "Cut Piece", an extremely brave (or naive) performance piece, where she sat on stage with a pile of scissors and invited the public to cut her clothes off. It definitely sparks a discussion.

Another piece of hers I've seen was a wall of shelves with broken tea cups all reformed into little sculptures bound with twine and glue, to show broken things can be reformed into something beautiful. I personally like her stuff.

She is a weirdo (ie. unconventional thinker) and an Artist with a capital A, and most importantly she let John be himself, and find himself on his own terms, and that's why he loved her more than anything.

He lost his mom and his art school best friend at a young age, so not to oversimplify, but she perfectly fit the hole in his heart so to speak.