Green hydrogen => Green artificial liquid fuels will happen because that's the only hope that long-haul air travel has for survival. Intercontinental transport planes will NEVER be electrified even if short-haul, small regional planes are. And if refineries are cranking out a green Jet-A replacement, there's no reason why they can't just as easily crank out green diesel or even green gasoline.
And avoiding the full transition to BEVs is worth trillions of dollars to a lot of corporations. And it's a lot of avoided hassle for millions of drivers.
Would it even be worth electrifying short-haul regional planes if regional passenger trains weren't a mess here in the US? If we had good high speed rail in certain corridors, you could reduce the need for planes for those short-haul routes.
The problem I have with "green" synthetic fuels is that it's wholly dependent on carbon capture, which itself relies on a green grid to have the impact being touted. Green hydrogen is the same way. And both are always going to be more expensive than delivering the electricity. So while they are potentially useful energy storage for situations where electrification isn't feasible, there's a premium paid to use it.
This is one reason I wish more PHEVs had 40-50mi ranges, to get better coverage for the majority of the short trips being done. But it's also why I wish areas where density exists invested more in transit options, we got more walkable areas where people wouldn't need to be using cars for short trips, etc, etc. The goal is reduce carbon emissions, and I don't think it's going to be any one thing that will get us there. We need a bunch of different solutions eating away at the problem in different ways.