Because it isn't.
Gasoline produces far more energy than hydrogen, but it is not nearly as combustible as hydrogen. The hydrogen molecule is the very smallest, and thus it is the most explosive in a perfect mixture.
Ummm no... not under the conditions we’re discussing.
At NORMAL air pressure, in an uncompressed state, and in a gaseous form what you said is untrue. Gasoline in the same condition has much more explosive power than hydrogen in the same form (a 1 atmosphere, and at normal room temp, and in a gaseous form).
And we are talking about ‘normal pressures’, the gas (hydrogen) NOT being under extreme pressure, or reduced in temperature, etc.
So... oh well, though, you’re right in that “hydrogen” has more potential energy. Did some calculations and hydrogen CAN produce more energy under certain circumstances.... But NOT under the conditions you will find in a car.
Sorry, that’s just plain wrong and this is my whole point here.
The author isn’t taking into account ALL of the facts.
The READERS are not taking into account all the facts.
The “inventor” of these items doesn’t know his science.
Some of the readers here (including me) sometimes leave out a lot of information in trying for brevity thus confusing others.
So... while you’re RIGHT in your statements, I’m right too. We’re comparing different circumstances.