I dont agree the following framing is accurate, but I can mention it because you've already said the important part (about how this issue exists, and mearly knowing about it doesn't create required work.) But here announcing it, and registering a CVE, Google is starting the clock. By some metrics, it was already running, but the reputational risk clearly was not. This does change priorities, and requires as urgent context switch. neither are free actions, especially not within FOSS.
To me, being someone who believes everyone, individuals and groups, have a responsibility to contribute fairly. I would frame it as Google's behavior gives the appearance weaponizing their cost center externally, given this is something Google could easily fix, but instead they shirked that responsibility to unfunded volunteers.
So thank you for saying the important thing too! :)