Isnt the idea to have cheap energy so as to not stall economic progress? Not have alternatives that prevent access to cheap energy?
You haven't answered the question, where did you get your info about the US having enough oil reserves to last into mid century?
The reality is that cheap energy is quickly becoming a thing of the past. It's not an issue of whether or not the oil runs out, it is that oil production follows a bell curve. The problem is that the world is quickly reaching the peak of that production bell curve. The oil industry knows about it, the government knows about it, but most of the american public is absolutely clueless. Why should the oil industry build new refineries if there is going to be less and less oil to refine? Where is the profit in that?
In any case, America is facing a serious crisis over this because most people live in the suburbs and depend on their cars to drive 20, 30 or more miles to go to work. You have to drive at least 10 miles just to buy groceries in most places.