And it is strictly "stopping distance" when it comes to speed, everything else is complete nonsense. The assertion about more cars than trucks is irrelevant. Driving risk is measured "per km" not some absolute numbers.
You sound like a typical idealogue who is completely disconnected from the reality of road engineering, statistics, and mechanics of vehicles that is typical of suburban mothers who think "speed bad" but then drive after drinks or text while driving. It is tedious.
And you're the one who brought "anglosphere" into the mix. And specifically in the UK, there seems to also be a lower speed limit for trucks: https://www.gov.uk/speed-limits
You're the one rambling off topic. You're the one calling people names. You're the one everyone is flagging. Log off and take a look in the mirror, you might find that I'm not the one "completely disconnected"
And just repeating things doesn’t make them different, up to 7.5 tones, it is the same speed and that is plenty enough different weight for stopping distance.
But then again, it is a useless conversation because you have no idea what road safety is about as you seem to focus on absolute numbers and the best way to get absolute 0 is to close all roads and ban driving.
And no, it's not strictly "if a truck can safely do X then a car can do X+Y. It's not just about physics. There are more cars than trucks, so speed limits matter more for cars. A truck getting into a crash is worse, but less likely. Trucks also already have lower limits in many places, so this isn't even relevant in most places.
Here, truck speed limits: https://dhl-freight-connections.com/en/business/truck-speed-...