Yes, we do. The question is... how? when? where?
Give me a steep hill, on a wide open hiway, I'm a sucker for WOT.
A while back, fastest you were allowed to go was 55.
Now it's marked 65, in some places 75 and others 80.
Who knows what the speed limit will be in the future.
Part of your question is more Why are gauges made the way they are.
You design a gauge to operate at mid scale for accuracy.
You don't get a gauge that stops at 80 cause that's you max speed.
You might stop putting numbers on it, but the peg is still at 110 to 160.
And the other part of your question, Why are we capable of going that fast when we only need to go to work.
Why don't we all ride 50cc scooters? That's the lone savage in the HD group question. Everyone feels better when you know that it's mostly likely that you'll break down together in the same spot.
Or perhaps your question is why are we allowed to build 500hp sedans.
Certainly we don't need to... unless we intend to tow a big trailer.
Or do you wish to have the Efficiency Police Agency pull you over in your Hummer because you are driving by yourself?