While I don't agree with the author exactly, I do admire someone sticking to their guns (no pun intended). Like Oscar Wild said, "Morality, like art requires drawing a line somewhere".
One of my favorite 80's movies was Real Genius with Val Kilmer. He accidentally helps develop a weapon and then goes to extreme measures to prevent its use. For some people creating weapons is a line they wont cross and that's not a bad thing.
Go through enough pattern recognition and you'll realize it's often not someone sticking to their guns.
Would the author have left if they didn't have another job lined up? Definitely not. Then, how strong are their principles?
That's not remarkable to many.