>A wealthy person is not someone with a lot of things.

No one made that claim.

By nearly any sane metric the world is wealthier. You can verify this on sites like Our World in Data.

We are healthier, have more leisure time, are less likely to die in natural disasters, etc.

It's willful ignorance to define wealth in a way that wouldn't show humanity as having gotten more wealthy. You're doing harm by overlooking massive gains we've made and understanding why we made them and instead redefining the common sense understanding of basic terms.