I am not saying that we dont have the technology or capability. I am saying that the technology ready and usable for a Pakistani ICBM is based on liquid fueled rocket which we do not intend to use anymore because of Indian ABM.
To make a solid fueled ICBM if ever Pakistan wants to do that, will need improvement in our solid fuel technology.
For Example look at the plume of this French M51 ICBM. Its about 4 times longer than the missile.
Now look at the plume of our Shaheen-3. Its about the same length as the missile itself.
So by common sense the French M-51 is producing 4 times more thrust than our Shaheen-3., and by same assumption we will need at lest twice as much fuel to reach same distance as a French ICBM or any other solid fueled ICBM. I am saying twice the fuel because i also assume that our ICBM is carrying 1 ton warhead not 2.5 tons like Trident or M51. For that kind of throw weight we will need even more fuel .
By that stipulation under current solid fuel tech capability of ours, the ICBM we make will be too heavy to be feasible.