uBlock Origin has the same requirement. Basically, to block ads on any website, it needs access to the data on any website. The wording of the permission is a bit weird maybe.
Yeah, it's a catch-all permission that says the extension wants to examine the DOM and HTTP requests. Absolutely necessary for any browser-based ad blocking.
It kinda has to do that to be able to click on the ads.
It needs access to all websites' data as it needs to see & interact with the tabs to be able to detect & simulate clicks on those ads.