There are ways to make accessible CAPTCHAs. It's possible to not discriminate against Tor users unless somebody's attacking the site from Tor. Cloudflare does neither of these things.

Cloudflare's CAPTCHA is now hCaptcha, which uses Cloudflare. If you want to get an “accessibility token” (or whatever) to bypass the inaccessible CAPTCHAs, you may have to first complete CAPTCHAs.