I think this set is designed for hvac or construction where the nut torque is not that high?Not for mechanics.
Mechanics may not use impact nut driver that often?
You answered your own question. These are for construction fasteners in the Japanese industry like solar components, unistrut, scaffolding, concrete anchors, road work, electrical/lighting, plumbing, etc.
I can’t tell you how many times I would have loved to have a 9/16 version of this wobble/fix socket.
We used 3/4 and 13/16 (heavy hex) deep sockets with impact drivers setting mudsill anchors. I’ve used 15/16 (24mm) working with structural steel bolts.
If Vessel offered these in SAE, I’d be interested in a set.