A decade or two from now, she may regret that decision. Helping certain charities can be a plus, but just giving away your money?
Assuming the billionaire grandmother likes the kid, she has an expectation to get a tidy inheritance. She won’t starve.
If I am reading article correctly (against fr standards) she wanted govt to redistribute, but they changed inheritance law. No longer able to confiscate wealth.
Her money do as she wishes- but agree with you she may regret.