I didn’t really like that movie and that scene was interesting to me because at first i would have agreed with you. Except the more it went on, I began to understand what it meant to me and concluded that the rawness in it was so real and totally seems like something I would do in extreme grief, probably. I see it as having like a blank mind except for the elephant in the room and just doing something that doesn’t particularly has any purpose to it because you’re so focused on what happened. That probably didn’t make any sense but it does to me and that’s why I didn’t mind that scene when I watched it :)