Did you know you have to enable it during installation on both Debian and canonicals derivative?
The difference is that Debian requires you to install with a screen/keyboard and/or use something generic like cloud-init not a proprietary tool that pushes people into telemetry and whatnot. Also a Pi is a lot less critical than a full system and almost always used by hobbyists. Professional users would change passwords / use keys so, yes, it makes absolutely no sense.