and patur aval assur what exactly is your point?? the mussar movement won, that argument is long over so r chaims shitta doesn’t really have any relevance.
All Yeshivos besides the ones on the brisker mehalech have a mussar seder so clearly all yeshivos hold of it. the discussion here is whether other yeshivos take it seriously
My relative is in BMG and he said during Elul, r Mattisyahu was constantly stressing the importance of limud hammusar. I think he went as far as “without mussar you have no chance”!!!!