You are speaking only from a free-speech perspective.

As a business user, I would absolutely want $CDN_PROVIDER to only allow / serve traffic in compliance with the laws of my country. I wouldn't want any chance of my non-controversial content being blocked because some third-party caused my host to be removed from the internet, either by direct action (BGP blackholing / similar) or by side-effect (IP or block being added to $FIREWALL blacklist).

When they change your acceptable content to non-acceptable content it might be too late to protest.

Your comment makes it seem like they they had a choice here. Cloudflare were given a court order stop Sci-Hub from using its services.

In years past they would have made a big deal about fighting the order.