no, not every request. only those that don’t exceed `ndots` number of dots, typically 1 for unix like OSes. so google.com will not have fritz.box appended
So that's still a mess, but no mess of "rip apart the entire home network right now".
1: https://www.freedesktop.org/software/systemd/man/latest/syst...
Server: fritz.box Address: fd00::[etc]
Non-authoritative answer: Name: google.com Addresses: 2a00:1450:4001:80b::200e 172.217.19.78