Forgoing a $10 million yacht would have 1000x the impact of my ski trip, but if 1000x as many people can afford a $10K vacation, the impact is equal across society. And yes, I do stand by as children die of cancer, just the same as you do.

You're still missing the point. It appears you're arguing against a commonly made argument that is not the one I am making.

I can afford a $1k ski trip if I plan and budget for it. You can apparently do the same for a $10k trip.

Jeff Bezos does not need to do that for a yacht. It makes no difference to his quality of life, his ability to feed, house, or care for himself.

When someone has so much in excess of what they will ever need, then failing to use what they do have for good, that makes them a bad person.

Choosing to plan and budget for a $10k ski trip instead of charity does not put you in that bucket. If you were instead able to make a $10k ski trip, each weekend November to April, each year, on a whim without thinking of finances, and did not donate to charity, then that would make you a bad person.

It's not "did you theoretically have the ability to help the child with cancer", it's "did you have that ability with essentially no downside to yourself". If you can take a $10k ski trip, and donate literally $0 each year, then you're a bad person.