To be under the gun means to be in a stressful situation that requires quick action, and this context is saying that such thinking is dangerous when technologies are involved.
Context: That might be typical corporate thinking when you were in a stressful situation that required quick action, but with technologies like these it was dangerous as hell.
Hypothesis: That might be typical corporate thinking when you were under the gun, but with technologies like these it was dangerous as hell.

Is the hypothesis incorrect? (Yes, no, or unknown)?