Tracking cookies provide incommensurable value to site owners for improving the quality of their web properties, which ultimately benefits users.
Example abound: finding out where people are the most frustrated (high exit rates), what content drives the most interest (page views), what content is missing or inaccurate (high bounce rate and low visit duration for visitors coming from Google), how they are using the site (browsing patterns from page to page), etc. etc.
Preventing all forms of tracking will definitely result in lower quality websites across the board, so like with all things there has to be a middle-ground found.
Example abound: finding out where people are the most frustrated (high exit rates), what content drives the most interest (page views), what content is missing or inaccurate (high bounce rate and low visit duration for visitors coming from Google), how they are using the site (browsing patterns from page to page), etc. etc.
Preventing all forms of tracking will definitely result in lower quality websites across the board, so like with all things there has to be a middle-ground found.