The issue is that you can make considerably more money using ads that 'track' you.

So instead of one ad being enough to pay for your content, you have to fill your website with banner ads, embedded ads, scroll over ads, animated ads, etc etc.

It's a slippery slope, more people use adblockers causing content creators to add more advertisements to generate the same amount of income. More people are bothered by the increase in ads, and download adblockers themselves. Rinse and repeat until ad supported content is unrealistic for all but the biggest of websites.

And I'm pretty sure even checking location is controversial. I've at least seen it included as part of tracking in the past.