If your attitude is "if you can't do it right, don't do it at all", that's fine. But a predictable consequence of that attitude is that, when the cost of "doing it right" is high enough, the only people who do it at all are the people who don't do it right.

The incentives are broken, and telling the people who point out that the incentives are broken that they're just making excuses for bad behavior doesn't actually fix the incentives.