Comment 1 for bug 1186600

Even if you are managing a computer from remote via ssh, you can do things in the order as described in the serverguide.
Why? Because the ssh session you are using when you issue the "sudo ufw enable" command is an already established connection and that path will be used to traverse the iptables rules set. You will not be able to make any new ssh connection until after the "sudo ufw allow ssh" command. In the extremly unlikley situation of somehow losing your ssh session between the enable and the allow ssh commands, then yes you would be locked out from your remote computer.

However, yes it might be worth adding some specific note, particularly in view of this message:

doug@test-smy:~$ sudo ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)?

which, in my opinion, is misleading.