Yes it is but it is not accessible for everyone.
No matter if you have a cli available if you use NS is because it was simple to use and manage.
At least this is the purpose of NS.
I agree to some point that Desktop is useless for NS but we are trying to make NS easier not to make the users learn *NIX.
If they have some knowledge about *NIX is better but it should not be Mandatory! IMHO.
Do not read me wrong. If you have some doubts about what i wrote please ask.
BR
Bogdan