But we do have so much written about musket volleys, and those were done by lower status soldiers as well. It is very strange that much was written about musket volleys but not archer volleys.
More importantly, volleys were crucial to breech loading gun tactics because unlike an archer a gunner is very vulnerable while reloading, since they have to hold the gun, load the powder and ball, and pack it down with both hands. The musketeers were in a formation several lines deep so that when the front line fired, they’d go to the back to reload and it worked much better if it was organized. This cadence also informed the pikemen defending them when it was safe to move and reposition. Archers could “reload” from a quiver much faster so there was no point in coordinating it.
One thing that I don't enjoy from COUP is he often demolishes ideas that approach strawman territory (is a barely coordinated order to start shooting a volley? or does it have to be something else), but I understand that from his perspective as a teacher, he has to disabuse his students of all the nonsense tropes they pick up from tv shows and movies.
The most obvious reason they practiced volley firing for muskets is the large amount of smoke they produce, once one person shoots the rest can't see where they would fire so you want everyone firing at once so they don't block each other.
So there is no reason to believe the practice evolved from anywhere, they is no world where they didn't volley fire with muskets that produce a lot of smoke since its the obvious thing to do.
After photography for sure, the Zulu used them extensively when beating the British.
Where do you think current students get their misinformation? A lot from TV?