That signal reaches a few industry insiders paying close attention. This will probably make the NY Times. They're many orders of magnitude apart in terms of impact.
I believe Tim is making a real sacrifice here, which is why it's so rare and impressive.
I think you're underestimating the "wokeness" of industry. Especially how much a token good guy is worth, when they are scarce. And overestimating his sacrifice. His net worth is at least 9M USD. That's already enough so he doesn't need to work a minute more in his life and do almost everything he could think of.
I believe Tim is making a real sacrifice here, which is why it's so rare and impressive.