As with any issue of security and privacy, there are tradeoffs.

> So you would favour blocking all sites and services that do any logging?

I make an effort to block as many as I can without breaking the page I'm trying to visit, yes. Usually this means having umatrix block about half the requests from a site.

> If you think logging is the same as tracking.

Logging by an analytics company, yes. And I do block those; Google is the most common, but this one counts.

> Parties like pi-hole etc don't contribute anything

This is a separate topic, but: Usability counts.