The free electricity argument ignores that everyone from electricity generation to transmission to distribution all have to make profits or they just won't build or operate anything. There's a tremendous amount of ignorance about how the grid and generation actually works among people like Seba, who used to be a reasonably careful analyst but now is just a media bobble head spouting nonsense that doesn't stand up to scrutiny.
Synthetic fuels will always be vastly more expensive than the alternative, even more expensive than hydrogen. Internal combustion engines aren't nearly as efficient as fuel cells and more energy draining steps in manufacturing means you are getting even less of the electricity to the wheels than with the already inefficient fuel cell model.
That you think carbon capture onboard vehicles makes the slightest sense suggests you should spend some time on the basics of combustion of hydrocarbon and the mass and volume of CO2 that results.
