Chalo i'm with you, but when lacing >10kg hubmotors into bicylce rims with bicycle spokes there is a limit.
The big mass of the hub adds much more stress than a heavy rider or vehicle would (either the spokes break or the nipples will pull through the rims).
So for such motors you want to have a rim with sufficienct wall thickness like these commonly used moto rims like MMP, Prowheel, SM Pro etc have, and thick spokes (minimum 12GA IMO).
Furthermore the spokes are quite short because of the large motor flange so there anyway won't be much flex in the wheel (which would make it stronger), and than it is saner to build it stiffer with thicker spokes.
IMO there is nothing wrong with the moped stuff, because the weight of the hub makes it inevitably necessary.
check this out:
this would be the optimal Hub motor wheel (it is BionX D motor laced into 20" bicycle rim).
The spokes are long enough for dampening the motor mass and providing some flex, and the motor is super lightweight as well.
I hope to get soon such bare D-motor and the single components for building that wheel.
than i will push it to the limits with external controller

- Votec V-FR frame / MXUS 3T / 17" Mitas MC11 / Adaptto Max-E / 20s12p 25R ->
approved as L1e moped and fully road legal in EU 
- Vector white / MXUS 4T / 24" Hookworms / Adaptto Max-E / 22s11p 25R
- KTM Hardtail Pedelec / eZee V2 6T / 27,5" / Kelly KBSX @ 1,5kW / Torque PAS / CA-V3 / 13s4p Sanyo GA in Shark case