All stems from a bonkers decision by Rose to completely abandon his position. Literally no good reason for it, he's not pressing the ball or anything. But for that we go in with a deserved lead.
Let's do it again 2nd half!
But what if he's only fit enough for say 20mins/half an hour? We don't want to be subbing him off halfway through first half.
Much better to bring on a senior, experienced calming presence late on, particularly if we're protecting a result.