I've seen a twitter thread where a woman described conditioning her son to find screens boring at an early age by only showing slow train riding footage on screens around the house at all times when the kid was around, which is interesting. I wonder if that'd work well in general or just for that one specific child. It'd probably fall apart as soon as the child gets introduced to the fact that cool dopamine hacking content does exist on screens?
You could of course just use the tablet to show slow riding trains. At some point though you end up on an 8 hour car ride or flight, and without an army of novel toys it's just far more practical to hand the tablet than have the child screaming bloody murder the whole time because they are bored. This is one of those things that makes the parent sound bad but parenting is 24/7 365 days a year and sometimes people need a low-effort break for an hour, even the child.
I'm very sure it is harder to achieve this now than then, I having been born at a time when color LCDs were just beginning to make tentative steps from laboratory prototype to consumer product. Unless Hoel is taken for the liar I've seen no cause to think him, though, it surely still can be done.
Easy for me to say, though, never having had or raised a child. I like to hope I still could recommend the method if I had, but who knows? I do think it asks uncommon interest from the tutor.