MftF is best understood as a best case scenario for successfully resolving the climate crisis.

That is, if we're to successfully address this challenge, with minimal global disruption (and where "minimal disruption" means all aircraft falling from the skies), then something like KSR's path is required.

I've seen your criticism voiced elsewhere (a major publication review that I'm lapsing on presently). This particular critique misses the book's point entirely.