Can somebody who has worked in this industry of user tracking/advertising please explain why this is still considered a technical issue as opposed to one about

Can somebody who has worked in this industry of user tracking/advertising please explain why this is still considered a technical issue as opposed to one about law/politics/social expectations/ideas, etc.? It seems that it is hard to technically prevent tracking because of things like browser and behavioural fingerprinting. I don't intend to suggest that technical things are completely irrelevant: I'm simplifying drastically (for example, I have faith that providing software that makes decentralisation easier, and does security better will help the problem as I see it). But from my quick scan of the proposed changes from Google, I'm curious why the trackers won't just switch tactics to the next easiest thing? Don't they already do that for people who block third party cookies in fact?