What makes you say that? They are well known for their IP reputation based captchas. The IPs with bad reputation are often services which exist to provide anonymity (vpns and Tor). They have done some interesting research into using zero knowledge proofs to allow good actors to bypass that without compromising privacy. There would be a lot of easier options if they were "vehemently against anonymity" than to make https://blog.cloudflare.com/cloudflare-supports-privacy-pass...