Until they take that setting away from you, "because security".

Not to mention that where DNS was centrally managed before, now you have to change settings in each and every application that uses DoH to resolve names on the Internet.

(And then Google decides to do cert pinning on DoH, and suddenly you can only ever use 8.8.8.8 and 1.1.1.1, and if you want to change it, you need to buy Enterprise version of Chrome.)