This is what you are not getting, 3x or 5x more solar, to create hydrogen considered financially, without even taking energy polarity into account gives you no information on which to make a judgement. You literally don't know what you don't know, because you probably never read a single one of the 400 odd stories I've written on the energy problem since coming across it during PhD candidate work in 2017, after already a long career in Systems Engineering, including historical patents on Energy handling components.
If you can't say how aerospace will be kept in the air, then you fail to meet the requirements of at least some stakeholders, some actually really important stakeholders.
The definition of a solution is something that meets the requirements of all stakeholders.
Who cares if 3x or 5x more solar is required, if it pays for itself?