How exactly do you think Bill Gates at peak Microsoft is going to fix this given "it's 100% on him?" And do you think the guys on the line are the ones on this email thread?

This is immensely more "ownership"/initiative than the vast majority of middle managers at any tech company would willingly take to solve a minor UX/CUJ failure, that's surely literally why he started the email thread and including the ones he did, to model that behavior for the the other middle management bozos and to try to instill a culture of caring about their work/whether it actually accomplishes the intended goals.