Sam2: I absolutely believe that Rav Herzog zz’l had so-called chareidim join him in his house. Unfortunately ,these were different times- so much so that people don’t want to know that Rav Kook zz’l had R’Yosef Chaim Sonnenfeld zz’l join him and together they visited many yishuvim in the 1930’s.
Can you imagine TODAY R’ Shmuel Auerbach shelita join any dati leumi Rov and do some joint appearance? Never in our lives, unfortunately. So, what happened sixty years ago is not being duplicated-sadly.