Millions? His work? Come on now.
Nature photographers can spend weeks or months scouting out a proper locale, picking the vantage point, waiting for just the right moment (or collecting and curating hundreds of moments), and then doing (possibly) final touch-ups in a photo editor. Their work is copyrightable, and it can be argued the only "work" they did was pushing a shutter button and maybe some touch-ups. Nature did the rest. We extend copyright…
https://en.wikipedia.org/wiki/Monkey_selfie_copyright_disput...