It's not about tech point scoring, it's about quickly solving a problem. Specifically how can my customers on IPv6-only networks reach my service hosted on Heroku (which does not support IPv6)? Cloudflare is a practical and relatively easy solution to that problem.
And the mess that is v6 when things go wrong...
I'm going to say it again. Private v6 and a powerful v6<->v4 NAT if you insist on using v6 only on devices, we're nowhere near the point where people can't afford a single v4 address and if the phone companies can do it at huge scale so can others...
Edit: "Adding support via cloudflare" ??? doesn't that mitigate pretty much 90% of all of the advantages of v6 in the first place? that's just implementing it for tech-point scoring...