Teamviewer 13 - option to start X, like NoMachine

Teamviewer 13 is great on Ubuntu16.04, with Mate Desktop, but I would really like the feature that NoMachine has, to start X if not already running.

Consider this:-
Install Ubuntu Mate on a DigitalOcean VM (or equivalent) and get running - quite a normal exercise.
Install teamviewer 13
Once started, DigitalOcean console tries to run X, which isn't particularly helpful.

Change the config of the VM to, with
#systemctl set-default
And reboot.
Of course, Teamviewer now gives only a console, there is no Mate Desktop.

But if NoMachine is installed, when the client starts it asks if it should start X.

Why can't Teamviewer have that option?