That’s a bad mentally as well. Most stacks these days are about quantity not quality. If you blindly hit 10000 targets it’s more profitable than trying to spear a single one.
Akin to not wearing a seatbelt because you are unlikely to be killed by a sniper
Linux with no services? That’s not a usable system for anyone who would ask “do I need a firewall”
Systemd is a service that runs logind. What are you doing without them?