Letīs look at ratings, where you say "And I'll still say who cares about ratings".
Advertising buyers need a metric to justify their ad buys. Going back historically, we had circulation figures for newspapers. That allowed the establishment of ad rates based on the potential number of people reached.
Going back to the early 30's, advertisers demanded measurement of radio audiences and radio ratings began. Like circulation data for print, the medium paid for their own measurement because, without ratings, they would be at a disadvantage against other media and not receive much, if any, ad buys.
So, essentially, every owner, manager, seller and employee of any station that hopes to get agency buys cares about ratings.
Small stations in large markets that can not compete for audiences don't have any motivation to buy ratings. Similarly, even the biggest stations in the smallest markets and towns don't get enough audience to be "worth the time" by ad agencies.
This is all a matter of economics that affects the entire industry. Without audience measurement, even more today than ever, advertisers will simply place their money in other members of the media family.
This perspective on ratings is just one example of how your points of view, while perhaps altruistic and noble, are not practical and would definitely not be profitable.