When, every single network I've ever used has had a broken mDNS. And there's no way I'm managing a DNS server just to have memorable addrs, especially when it's not my own network.

If you want a real example, I was at a nonprofit event helping with their video livestream. They have a Zowiebox that displays its IP address on a digital display. I reached its web management portal that way on their Windows PC that ofc had no nmap etc installed. Oh and that box is IPv4-only.