We have a huge fleet of cars, trucks, planes and ships that are all very carbon-positive. We also have a huge amount of existing infrastructure for delivering fuel to these things.

Sure, cars and trucks could go electric, but large airliners probably never can, and it's difficult for ships. But even for cars it will take decades to fully transition to electric. An economically viable, carbon neutral fuel that could be brought to market and scaled up quickly would be a huge win for the transition. Especially if it's cleaner burning (no/very low sulfur, aromatics etc.).