Thats an interesting example, as I've found a similar use. In dead-slow, ultra-sharp turns, usually starting from a stop and often in some kind of very cramped area (like a u-turn on the bike path in the pic below), I will need absolute balance control, and pedaling throws that off. Hitting throttle on the front wheel motor (which is set to have a slow-slow-start) lets me concentrate entirely on balance and just use my thumb for momentary throttle blips to get me gently around in a circle so slow and so tight its barely navigable in the first place. This is a cargo bike that is 8 feet long so balance with a load in the cargo box and maybe in the panniers as well is a big level of difficulty up and over a normal bicycle.
I could dismount and walk it but its a hell of a lot more convenient to do it this way.
View attachment 11055