yes taught is just a nice wording, some notations on Reagan freely state that he forced to be right handed because being left handed was considered a handicap. By the way I am right handed but shoot rifle left handed because I am cross dominant.
Even when I went into the service they wanted us initially to do bayonet training right-handed. There were some guys that really struggled so they relented and allowed both. Since I could go either way and the Sergeants loved keeping us holding the 9.2 lb. rifle out in the tiring thrust position, I alternated.