Lack of understanding the game, information about players & being clueless about the contemporary cricket.
When you are out of your depth, you try to do conventional things that covers your a$$. Most of PCB’s actions are to cover up for awkward situation - team selection is just a part of it. A classic example - Hafeez was shamed for his own performance, so he retiered to save his World Cup dream; but I can bet had he been available, he would have gone to SAF, and whatever he does Inzamam is covered - for that hundred against AUS; Ul Haq will use his weight as player to prove why picking Hafeez was a logical call. But, that would have cost Shan’s spot - his batting improvements should have been evident to technical people, but it didn’t - hence they didn’t risk him when hafeez was available (in uae).
Similarly, few days back after scoring almost 20K runs for PAK, MoYo has suggested Azhar & Asad for WC - is this only buddy backing? No - this is absolute dumb suggestion, someone who has no clue about the topic, so safer option is to back seniors. I can bet my house - MoYo isn’t aware of Asad & Azhar’s ODI stays, didn’t bother to check either; they are seniors, so easily explainable bia experience route. Someone listening Rameez’s commentary should realize what I am trying to say. Our Athar gets lots of bamboos for his hyper actions, but I can tell that the guy can utter the ins & outs of at least 50 BD players instantly from his memory, because he follows BD cricket like 2nd religion - which game we won/lost, why, how, who failed, what went wrong ..... and this is even junior level.
I have to say, the amount of information one can get about PAK cricket, cricket as a whole, new players, different conditions across world, cricket strategy, tactics, past history, technicalities of any skill, combination - none in PCB possess a fraction of that; hence picking (& praising) known senior faces are the safest option.