[mixmastamyk]

False dichotomy. Poor dev practice is not fixed by elimination of QA, but rather fixed by improving dev practice. The “five why’s” can help.

[itsdrewmiller]

If you're working without a net, you're going to be more careful. And 5 whys is not a particularly great overall practice. https://qualitysafety.bmj.com/content/26/8/671

[mixmastamyk]

You're also more likely to die when mistakes inevitably happen. Dismissing reason is another strategy not likely to work well in your favor.