Why would you think reverse engineering is somehow "wrong"? You're not "stealing" source code, you're deducing operational concepts and then reimplementing it

Why would you think reverse engineering is somehow "wrong"? You're not "stealing" source code, you're deducing operational concepts and then reimplementing it with your own work. That's perfectly fine in a lot of, if not most cases. (Legal exceptions: your country forbids reverse engineering, or the software is patented [= in both cases, your legal system sucks]. But those are legal arguments, not moral.)