“he himself didn’t approve Or at least never expressed disapproval of the shita against beards of the
Mirrer Yeshiva Except for those on a much higher level”
Truth,
You’re 100% correct. There’s a famous picture taken in the early ’50’s of the entire Mir yeshiva in Brooklyn, nearly all of whom were clean-shaven, including a young Harav Shmuel Birnbaum, zt”l, at the time already married to the eldest daughter of Harav Kalmanowitz, zt”l. I guess he didn’t know as much halacha as our resident nasty troll.