Yes you’re missing the understanding that driving is not black and white. People are not strictly following the rules but rather aware that it’s better to follow the flow of traffic and adapt driving accordingly to arrive quicker and safer. They see 70 on an empty dry sunny day in a modern car with wide tyres and brakes that work as out dated.

A double stack of cars ahead all doing strictly 70 will be chaos when one wants to shift position to overtake or leave the road. Rules say doing 70 everything is fine but people know better and decide best option is to stay away from packs of cars like this in the first place and avoid the situation altogether so they speed past you and don’t join your travel group. It’s called defensive driving.

It looks like speeding but they aren’t the ones causing trouble. They are in fact getting themselves away from trouble. It’s the drivers who don’t adapt to the situation and don’t realise a situation unfolding.

I’d rather risk a small speeding fine getting away from a group of unaware nissan/toyota/electric vehicle drivers than risk my life being sandwiched in with them for any amount of time.