If an armored convoy is not enough to protect your nuclear weapons, then you have an entirely different problem that needs solving first.
The concern appears to be, at least partially, "the Americans will watch the convoys via satellite and know where we've got them all stored".
You're right Pakistan's problems are many and epic.
But saying "Hey, I have a great idea, you should solve your problems!" is not brilliant advice. They've already thought of that.