They are, but that doesn't mean it's their fault when websites fail because LaLiga decided to block an entire ISP. That's pure victim blaming. "Oh, what did you expect when you rely on a third party and another company wields the power of blocking anything without a specific court order?"
Sure using a different domain has come to being bad practice for security and performance reasons, nonetheless fetching libs from CDNs including cloudflare remains prevalent. Even if they would make a move that is slower than takedowns.