That's not enough. If anything, it can make tracking more pervasive and harder to control. The server fingerprints the user and shares this info with an ad net

That's not enough. If anything, it can make tracking more pervasive and harder to control. The server fingerprints the user and shares this info with an ad network, fetches and injects a personalized ad. Same result, zero accountability: no way to delete server side PII, no way to know what information was collected, no way to know how it was actually used. Even worse, the server gets to read the ad delivered to you, which may leak even more information. There is no purely technical solution which can replace regulation.