I understand the sentiment but its never going to happen.
Riding a MC takes more skill and a higher level of attention than driving a car. In the US we average 40,000 motor vehicle deaths a year, in spite of crumple zones and seat belts and air bags and anti lock brakes, and new cars with collision avoidance, the death rate stays pretty level over the decades.
Encourage those people people to ride a motorcycle and I dont think it will end well.
Riding a motorcycle takes either a threshold of commitment, or being below a threshold of income. You have to buy a really really inexpensive motorcycle for it to save you money in the long run over having just a car, because for most people they will still need a car. And then you have to be willing and able to do a lot of service and maintenance yourself. For example, my car gets 25mpg, and my VS650 gets 60mpg. But the bike wears through tires so fast, if you add in the cost of having a shop put new tires on the bike every 10,000 miles, the tires cost as much as the gas per mile, effectively knocking the fuel cost down from 60mpg to 30. Car tires last 3 times as long, and in my case a set of tires for my car is cheaper than paying for an installed pair of tires on the bike.
Unless you force MCs to ride two by two, or force them to lane split all the time, you are not going to save any space on the road. A motorcycle takes up half the parking space of a car. And a fender bender in a car is a week in the hospital for a MC rider.
In poorer countries people ride motorcycles far more than we do in the US. They are cheap little bikes that you cannot buy in the US, and the injury and death rate from accidents is at a level that is unacceptable in the US.
The flip side of this is: if you are able to ride a motorcycle in the US, and ride safely and save money and fuel compared to driving a car, pat yourself on the back and take some pride in your accomplishment, because by definition half the people in the US have an intelligence that is below average, and they would not survive long if they were compelled to ride a motorcycle everyday.