You’re completely ignoring the fact that it takes 3 to 5 times as much energy to actually drive a hydrogen car, because of the (in)efficiencies of the hydrogen production, supply and consumption chains.
And given that the driving of a car is what consumes the most energy in its lifetime, the much higher efficiency of a BEV ‘pays off’ the higher production costs, both monetarily and ecologically.
Vertical farm viability scales almost inversely with electricity costs. And the latter trends lower and lower as time goes by. So I’m pretty confident that it’s coming.