Still, when I'm traveling I set the expectation that I'm only sporadically available. Not that different from normal life, actually (especially outside of working hours).
Ultimately they might get away with ripping out the whole entertainment system out of the plane altogether for another .1% increase in efficiency.
My understanding is that it's actually a condition of using Starlink for commercial aviation. Every other airline that's announcing a partnership with Starlink is also providing it for free to customers.
IMO, it's a way for Starlink to put pressure on other satellite internet providers. The utilization of free wifi will be way higher than paid wifi. And the other networks - be it OneWeb, Viasat, Hughesnet, etc. don't have as much available bandwidth.