I don’t think anybody here is suggesting this is higher priority than many of the other issues and feature requests currently facing the development team.
To my mind, avatar customisation (not just beards) is a perfect 3rd party developer marketplace opportunity, letting Asobo focus on the world and the aircraft.
I’ve been flight simming since the 80s, have flown solo IRL (gliders) and consider myself quite a serious simmer in many respects. I do however recognise that we have a very wide audience with vastly differing priorities and play styles. It’s these “game” aspects of MSFS that will draw in new players, feed new developments and ultimately fund the hardcore simmers.