In fact, the "civilian" in Civilian Generals doesn't solely pertain to cultural functions, it's similar to technical military ranks, and those who can be honored with such a rank certainly aren't from artistic troupes or the likes.
Tu Yuan was able to obtain the rank of General because his main focus is on the study of warfare.
From this perspective, Ji Xinghe, who has been reading books for over fifty years, probably has a higher cultural level than Tu Yuan.
But Tu Yuan disagreed, what he couldn't accept was the fact that despite Ji Xinghe being well aware of all these realities and truths of war, he still looked at the Federation soldiers in this war with a compassionate mindset.
So he pressed Ji Xinghe during his silence.