True. But we don’t have enough synthetic hydrocarbons for the current most important usage: jet fuel.

Might as well drive a quiet, renewable powered electric vehicle and let the jets use the synth.

Or take the train.

If we're talking synthetic fuels, you'd probably run cars on methanol rather than a hydrocarbon. Planes absolutely need kerosene, but cars can claw back most of the performance of petrol with alcohol fuels, and methanol is the simplest and cheapest to make. Certainly shipping seems to be going this way.