Most people are intimidated by airplane cockpits. I think you’re right that specialists in certain situations where they’re familiar have much higher tolerance for visual density because, to them, it isn’t dense, it’s meaningful.

Most people for most situations, using most phone apps, do not have that familiarity. Mobile design has to simultaneously provide a lot of power and progressively disclose it such that it keeps users at or just past their optimal level of comfort, and that involves tradeoffs to hide some things and expose others at different levels of depth.

So while I agree that a lot of mobile design, and OS design in particular, pulls back way too far on providing affordances for actions, I would not use an airplane cockpit as a good guide, unless you’re also talking about a specialist tool.