I believe Pakistani White ball cricket is in safe hands. They have an abundance of resources in fast bowling so no matter what, they will bring any random kid and he'll do wonders in the white ball, after a couple of years someone else will replace him and this cycle will go on due to the vast raw fast bowling pool.
The problem will come in Test cricket only.
Yes, I agree with you. There is a problem with test cricket, which is that you need a certain amount of skills in order to be able to execute the plans that you have made. In spite of that, if you are giving this job to a young player, he is most likely not experienced enough to be able to put the plan into effect as you planned.
But in one-day internationals or T20 cricket, that is not necessary, because the batsman is most likely to play shots anyway. It is true that test cricket is a form of cricket where the margin for error is really low. And experience is much needed in test cricket.
I bet if PCB had the guts to create fast pitches which they already do in domestic and against Bangbros etc then these last 3 series would've been very competitive.