Joanne is proof that money can't buy happiness

She's one of the richest and most influential people in the world - if she tried, she could end or at least severely reduce poverty and hunger, at least in the British Isles. With her influence she could have led many people to become more open-minded and tolerant, her influence may even had made more people vote against Trump (his defeat would not have depended only on Rowling's influence over people, of course) !

She's literally so rich she could have made the UK the first country in history to get rid of poverty/hunger !

What does she do instead ? She drove almost everyone she knew away, enabled the bigotry of those who stayed with her, destroyed her own reputation to the point that nobody wants the upcoming Harry Potter adaptation and she can't even keep a mask of humanity nowadays.

Despite being rich as fuck, Joanne is clearly feeling miserable and persecuted, and can only feel powerful by hurting others, like the bully she is