[inkista]

I dunno, I just watch a heap of you tube videos and study the way folks are moving the heads, most seem to just 'move it' without having to push something or whatever...

The lock button tends to be at the hinge of the head, where you'd grab to swivel or tilt it, anyway, so you'll press the lock button with your thumb, adjust the position of the head, then engage the lock by taking your finger off the lock button. It'd look like a single motion.

The thing is if the head is only held in position by friction, over time, the head can wear the joint smooth enough that it may not hold position any more. And in the case of Godox, they're using a very thick grease to add the friction, which causes you to have to rotate the head with more force, introducing additional torque on any hotshoe the flash is attached to. Wedding/event shooters who always use speedlights and are constantly bouncing and adjusting the swivel/tilt mostly eventually have to deal with a loose hotshoe (which is a pain, but usually fixable), but more torque means having to deal with it more frequently. A head with a lock button typically moves much more easily and places less torque on the foot. This is a gracenote thing, though, that not a lot of users encounter.