Yes it will.. you buy a shotgun thinking I own a pistol and you will feel you have the upper hand by a far margin.
The day you find out I not only have a pistol but a carbine as well you will panic and start spending cash on much more including sniper rifles, ammunition etc.
That I cannot keep up with and it forces me to send my whole family hungry just to keep pace with you.
So the smartest thing is to keep you guessing.
A very good explanation for the light headed.
However, please note, that as long as the weapons purchases are from China to Pakistan, they can be kept a secret to a very high level. China, being a tightly censored state and with state owned military complexes, keeps a very tight watch on it's activities and thus keeps the workings secret. Pakistan is expected to do the same.
However, when Pakistan buys equipment from the West, hundreds of millions of dollars worth of deals don't just happen secretly. One way or the other you find out. For example, in case of US, the congress has to be notified for any potential foreign sales and thus the word gets out. Same with European firms. Lest, you have to ship them.....you can't ship Howitzers, tanks, Fighter aircraft and hundreds of missiles in your suitcase. You either send your own assets to pick them up, e.g. C130s of PAF for the MAR 1 missiles.....or you hire a global shipping company. Which again, leaks the the stuff out.
So one way or the other, a smart enemy with enough resources, will know what you have.
Secrecy is perhaps the biggest thing working in favor of Pakistan, when Pakistan buys from China. I hope it continues in that fashion.