Actually, people are trying to steal business secrets, and they are doing so all the time. The Chinese are notorious for it, and they target basically any business that has a valuable trade secret, even those that are not military. Even the US has been caught using its intelligence apparatus to pass foreign trade secrets to domestic businesses:
If I were running a business whose trade secrets were worth more than a few hours of some Eastern European hacker's time, I would be concerned about computer security.
https://en.wikipedia.org/wiki/ECHELON#Controversy
If I were running a business whose trade secrets were worth more than a few hours of some Eastern European hacker's time, I would be concerned about computer security.