Cricket mysteries

Pakistan broke their losing streak at last by winning the matches against Zimbabwe and the UAE.
Is there any expert of cricket on earth who can tell us why the management is persisting with playing Nasir Jamshed, who has failed with his bat time and again? He is a very poor fielder as well. Second, why do we still have Umer Akmal, who drops catches regularly? Third, if Sarfraz is to be kept out why was he selected in the first place?
Syed Irtiqa Ahmed Zaidi
Islamabad