Sounds to me they're limiting vehicle speed rather than power.
In big rigs, including our 45ft RV, if you don't get up enough speed, you will end up bogged down, behind the power curve, doing 15mph, especially out west.
Vehicles speed up on the downhill so they can make up the hill without slowing down a ridiculous amount.
As a truck driver of over 25 years, speed and power are vital to each other. Being able to maintain speed limit approaching an upgrade means less time getting up the hill and less fuel usage lugging uphill, along with less wear and tear on equipment. We have a hard enough time doing our jobs in a timely manner without nanny-state regulating every single second of everything we do.
I’m guessing that you’ve never driven a large commercial vehicle. I used to drive coaches for a camp. (think Greyhound bus) One of ours was limited to 70 mph. It was a challenge on some larger hills. If you hit it with some momentum, you could maintain some semblance of speed up the hill. If you lost that momentum, you were crawling up the hill at 20 mph. It made a huge difference.
I frequently drive a smaller commercial vehicle for my job. 15,000 lbs or so. This is a beyond stupid rule.
Torque? Low gear? I don’t understand the technique an e-truck/direct drive interesting. Maybe Im not understanding the transfer of direct power an electric motor and reduction gear will provide. The only experience that I have thats relatable is a diesel electric ship,
abd a hybrid camry, and my corded electric leaf blower.