But why wouldn’t they change their minds if those big corporations actually changed their ways? Is there a similar sentiment against red hat?

I now understand where you’re coming from but I am not sold on your prediction that the agpl would crater if Google started complying with it. It would mean that Google open sources everything which is derivative work. That sounds like it would buy a lot of good will amongst precisely those people who are mad about how Amazon screwed redis (to put it bluntly).