Right, maybe those words don't express the action correctly: the experienced way to do it is like you say, but it's a little tricky for new drivers. And then there is the noob way where they keep the engine rpm bouncing around 5k and slowly let go the clutch as needed. Can really stink up or even smoke up the street.
What would be the alternative? There's no other way to inch uphill than to grind the clutch. It's fine as long as the engine stays below ~2000 rpm.