Can you imagine how Mando feels seeing Luke wash like 40 of them droids and 1 damn near took his life
Imo, watching Luke tear shyt up is why he opened the door. I know grogu was asking him to do it. But he listened to him because Luke’s fight confirmed that a) this person could protect his child from harm (), b) that he could do so at a level that mando himself could never achieve, and c) he couldn’t really stop him from taking grogu, even if he wanted to.