Question

I saw that in Responsa HaSho'el, part 5, at the end, they brought a question asked to Rabbi Aharon Leib Steinman about whether the kollel students of Kiryat Sefer are indeed exempt from payment for the city’s defense (a security fee in lieu of guard duty, or actual guard duty for the city), because the mayor obligates them, or whether they are exempt because they study Torah.
And he answered that most Torah scholars (except perhaps 10 in a generation…) have not reached such a level that they protect, and therefore they are actually obligated either in defense or in payment in lieu of guard duty.
(And anyone who has time to come and ask me questions like these is certainly not one of those 10 rare individuals that perhaps exist in our generation.)
My question:
If someone is obligated in the defense of his city because his Torah does not protect,
would he be obligated for exactly the same reason in the defense of the state as well, and therefore have to go out to 3 years of service and reserve duty like everyone else?