So improve the software and fix the bugs? How is this a valid response?
It is important to apply ethics when developing technology, as rationality alone is not sufficient.
It's not the tool we need to debug; it's us.
[0] Where, by "these tools", I mean machine learning writ large.
EDIT: I highly doubt your comment's parent was suggesting we had to be irrational in order to be ethical. Rather, I believe they meant we should be rational and ethical. Wouldn't you agree?