I mean, yeah. When people way saving the planet they mean saving humanity. That's exactly it. A barren rock does no one no good. I don't get it why people hang onto this expression, it's as if you heard that George Carlin bit and now that's your anchor to reality.
It's not like the dinosaurs had a save the earth campaign. Yet, before humans the rock had life forms that died out while the rock itself continued being a viable planet supporting life. If humans die off, the planet will continue on with life continuing in new ways.
For the past 50+ years there really has been a somewhat significant and quite influential body of people who genuinely want to preserve the planet’s ecosystem even at the expense of the people living on it.
Bezos is one of the best, though? Blue Origin, the Long Now foundation, and I could go on all day. I don't know of too many other billionaires so willing so spend vast sums on the Heinleinian dreams of their youth.
I don't believe it's a net benefit to the world when a single person fundamentally changes entire economies, captures a significant portion of the resource stream and then maybe a some point redirects a portion of of it to their pet projects. Although I strongly support shooting tech bros and politicians into space (one way; even better)!
The Bezos Earth Fund: https://www.bezosearthfund.org/