It means you can use a decently fast DNS server like Cloudflare without the major privacy problems of using Cloudflare. Or DNS4EU, or any non-ISP DNS server really.
Your ISP snooping on you with SNI logging is something people using normal ISPs don't need to worry about, but feeding all your data into a profit-driven company is.
> something people using normal ISPs don't need to worry about
It doesn't matter which ISP you're using if the cables are tapped, which they pretty much are.