This sort of thinking is why ssh known_hosts is hashed by default, breaking tab complete for ssh.

I really wish it weren't, and a decent penetration tester will know what to do with the known hosts machine on a machine with IP 192.168.0.83 anyway (which is the common case for me), or can just feed it to one of those botnets that ssh's to every public IPv4 address on earth every 60 seconds or so.

But, like password restrictions, the important thing is is inconveniences everyone, so it looks like the security team is doing something.