I grew up around guns, started shooting in 1982 at the age of 11, and started shooting pistols in 1983. My Dad strongly preferred DA revolvers, so that is most of what he owned and most of what I shot.
I would not have known how to load or unload a single action revolver prior to at least 1998.
I would never have known the proper way to load an M1 Garand if the P.A.L. rifle club I joined did not have a few of them.
I would never have learned how to load a muzzle loading rifle if I did not occasionally shoot with a friend who used one to hunt deer. I have still never loaded or shot a black powder pistol.
It may be advantageous to own at least a bunch of .22's in as many action types as possible to familiarize new students. In many cases, that would be my only reason for owning them.