You are only considering what would it cost Pakistan. But what about what would it cost us? You say we are always at war, give example of killings in pathankot, Uri and pulwama, but these acts took place in India! Why did these atrocities allowed to be committed at first place? Why were these not detected beforehand and once one of them occurred why were the measures not taken to stop them? Instead we crossed LOC (which was not even done in kargil war!), bombed an area, claimed killing JeM terrorists without providing any proof to anyone of JeM's presence. Don't tell me this attack was not politically motivated when Modi blatantly claims it as victory. And now we are left with 1 more soldier life on line ( or maybe 2) in foreign soil. You might not have any relative in army, if you had, you must not have said this.