Once you buy a yacht 450 million dollars of ownership in a company you had goes to people who built a beautiful thing that exists in the real world and you're on the hook for employing a lot of people to maintain it.
I take a lot more issue with accumulation and hoarding of wealth than the spending of it.
https://scottsumner.substack.com/p/imagine-130000000-washing...
Once someone reaches that level of fame and fortune it's almost a requirement if they want to travel or have some sort of 'vacation'. Don't get me wrong, it's definitely a great problem to have, but it's one of the only ways to find privacy at that level of wealth.
If I'm ever super wealthy, I hope I can also stay somewhat anonymous so that I can walk down the street like any other person.
If someone starts paying the fisherman, farmer, builder, more to stop doing what they are doing and start building mega yachts, then there will be less fish, bread, and houses for others.
That said, I assume it's much simpler than that and it's just about the hypocrisy of the climate change billionaires to be bellowing out carbon while demanding the selfish greedy commoners cut our emissions.