I am personally more concerned with software engineers and network engineers aiding and abetting the imprisonment, torture and execution of people by repressive regimes, by enabling surveillance technology and fucking with internet traffic analysis. Way more people are going to be hurt in the near term by that than by therac-25 type mistakes.

For example if you're a Chinese network engineer, and you can avoid it, don't take a job setting up tracking and database of Uyghur people. That is an ethical issue just as important as the therac-25 type problem.