For privacy concerns, I would imagine that preventing the methods of tracking is much safer and more effective in the long-run than blocking the trackers themselves. Apple seems to be pushing pretty heavily on that front.
Definitely agreed. But nobody (including Apple) is going to pull that off for a pretty long while.
In the meantime, it's useful to be able to do things like block all third-party AJAX requests and whitelist them on the fly on a per-site basis, or intercept CDN requests for common libraries and redirect them to locally hosted versions.
Extensions like UBlock Origin may be a band-aide, but sometimes band-aides are useful if you're waiting for an open wound to heal. In the same way, when I give people privacy advice, I'm optimizing for things they can do right now.
