@int_ua
If you are already on it, would you mind to insert a config (e.g. simple and easy check for presence of file [enable: touch ssh_on_reboot]) to have ssh aauto started after reboot?
Since some version, it was disabled. I made me a workaround (I cannot remember right now ) to have ssh on automatically after boot.

Regarding your question:
this would kill also outgoing self-established connections? Then against it.
Or just the listening daemon (with all incoming connections)? Then agreed.
But I could also imagine there are use cases to stop the daemon to disable further incoming connections, but keep the already existing alive.
So better wait for more input.