Indeed, the road to hell may be paved with good intentions. Certainly the road to hell on earth is.
Good intentions are not enough. Good intentions must be supported by practical wisdom (also called the cardinal virtue of prudence) so that the intentions are directed through understandings and actions that will further them, rather than thwarting them and making a travesty of them.
Let me take an example that should be non-political.
Let's say that you or I are standing near the curb in front of the stores of a shopping center, and a driver is on the roadway about to cross in front of us. Let us also stipulate that the traffic is light.
What should the driver do? Should the driver stop to let us pass, or continue at his (presumably) safe speed?
The answer may surprise you. To speed both us and the driver, and to avoid creating needless danger, the driver should continue without slowing. Why?
It will take the driver a certain amount of time to reach our position at his speed, and a little more for his vehicle to pass us. (At 20 mph, or about 29 feet per second, it will take about two-thirds of a second to pass our position once he has reached us.)
But if he chooses to slow to a stop, it will take longer for him to reach us and reach that stop--about twice as long if his deceleration is reasonable. And only after he has stopped can we be sure that he means to stop, and decide to move in front of him.
But we shouldn't decide to move in front of his vehicle (still in gear with the engine running, and held only by his foot on the brake) until we have established eye contact. That's a further delay--for us and for him. If we don't establish eye contact, we don't know he was stopping for us. He might have been waiting for something else--and if he doesn't notice us, he could run us over when he decides he wants to go.
In addition to the hazard of walking in front of a vehicle with its engine running and in gear, and to the time lost by everyone involved, there is the waste of fuel and added pollution resulting from bringing a vehicle to a needless stop and then setting it in motion again.
What should practical wisdom counsel? That the driver not stop! But we-the-pedestrian cannot count on it, and too many pedestrians will walk in front of the car assuming the driver will stop for the driver to continue without slowing a little--which may encourage the pedestrian to walk off the curb prematurely.
Apart from making sure that everybody takes high school physics, what can be done about this stupidity? Would making everyone take high school physics even help, in this era of grade inflation and passing students without regard to their performance?