They built a footgun into a toaster, and victim blame when people complain that they thought it was just supposed to make toast. Users should not be put into a situation where they need to configure ACLs in anticipation of undocumented features.
My hope was that with a little public prodding they would do better in the future. It is a product I want to like, maybe not for what you or I do, but lots of folks out there are slinging cat pictures where it will be a net benefit.
"Victim blame". They announced an opt-in feature.
(We don't use Tailscale SSH, and are unlikely ever to; we have a separate source of authentication truth for SSH, and a separate certificate-based access control system.)