In that case: local resolvers involve actually installing and configuring a recursive dns server, which isn't everyone's idea of fun, whereas 1.1/8.8.8.8 can be

In that case: local resolvers involve actually installing and configuring a recursive dns server, which isn't everyone's idea of fun, whereas 1.1/8.8.8.8 can be set up with a one line config file edit and then forgotten about.