ABC depends on "gadgetry" ? So does this conversation.
Playing by ear is not "inclusive for everyone", some people are not comfortable with it at all. I've been in sessions where people insisted of fiddling with "print technology" because they think they're helpless without the dots. It *is* a nuisance, when the other players don't need to wait for them to find the right bit (whether it be a pile of paperwork or a little electric box). I was brought up to play from "the music" (meaning dots), I had to work hard to get the hang of using my ears, (decades later, I'm still not reliable at recognising intervals). I think most people are more comfortable with one than the other, not many people are equally capable of learning a tune with their eyes and their ears.
To my mind, the bottom line is that I don't see how anyone's going to play a tune unless they know it, have it in their mind, their memory, their fingers - are familiar with it. *How* they do that is up to them, and best kept out of other peoples' way (apart from when we're swapping hints, like now). A learning technique is not necessarily useless just because some people don't have a use for it. The point is to learn the tune and play the damn thing. Pass it on.