It's probably far worse with Android users that Google is not disclosing. I'm seriously considering changing to Apple after this. Not that its secure but that they are willing to go to this length to communicate it.
Far worse with Android users? In general, sure. Google Pixel phones however nowadays comparable to Apple in terms of security. Some argue more secure. And as others have noted Google has notified people about similar before.
Plus, I don't think the onus is on Google to monitor and alert for other OEM phones ala Samsung, Motorola, etc.