I agree Ram, but, as I said in my initial posting, John is dead and cannot damage his image through his own actions/choices; Paul can, especially since he is still active as an artist (and I hope we always will be!); and frankly Paul has made some questionable moves that you can't help but say "John would've never done THAT" for example Say Say Say with MJackson; why did he do that, for a hit? He'll never be able to shake that exactly because it was such a big hit; same with Ebony and Ivory.
There's also something else at play here. Paul has destroyed the image of an artist as a troubled, suicidal maniac that hates his life, his wife, has issues with his mother, society, etc. Paul showed that you can be a genius and also be happy, be a great father and husband. That bothers more people than you may think; and Paul's image is somewhat shaped by a lot people that write and are themsleves troubled. I can expand on this, but I hope I got the basic point across.