[dralley]

You need to consider that the status quo is "send all your browsing data to everyone, in cleartext".

(where "browsing data" is defined in both cases by the contents of DNS requests)

At minimum I'm more likely to trust that Cloudflare will uphold their contract with Mozilla than that my ISP (Spectrum) isn't happily selling out my browsing data -- and the ISP, unlike Cloudflare, knows my name and address.