I still don't understand what's nextdns.io doing in the stack. Couldn't you just run your recursive resolver as recursive resolver and let it ask respective au

I still don't understand what's nextdns.io doing in the stack. Couldn't you just run your recursive resolver as recursive resolver and let it ask respective authoritative servers directly, instead of forwarding to the middleman? You can run your own blocklists on your unbound/kresd/whatever. Then DNS servers out on the Internet are queried by some random IP from a VPS/EC2/VM IP range, so they are about as wise as when queried by nextdns.io.