I think we can all agree that restricting uBlock from working on YouTube probably isn't going to happen, and you might want some restrictions on addons accessing all data on a banking website.
But where did they draw the line? Is someone still allowed to publish an addon which fixes the interface of an absolutely broken banking website, or which allows you to liberate your own data? Will that only be allowed through vetting? What about things like Dark Mode addons which have access to all websites? Is it possible to explicitly request to be included in the allowlist?
I am not against it on principle, but we're missing a loooot of information right now to decide whether this is actually a good thing.