Mistakes are mistakes.
Unless they start to happen on a regular basis. Then it is a pattern. Patterns of Mistakes feel worse because they imply that the person making the mistakes are not just responsible for the mistake, but they indicate a larger deficit in their judgement or character.
Except, it usually does not mean that at all.
The Fundamental Attribution Error is the idea that . . .
people tend to (unduly) emphasize the agent’s internal characteristics (character or intention), rather than external factors, in explaining other people’s behavior. This effect has been described as “the tendency to believe that what people do reflects who they are”
https://en.wikipedia.org/wiki/Fundamental_attribution_error
These patterns of mistakes are just that, mistakes. The person who made them are still responsible for them and for fixing them, but it is not worthwhile to try to infer some moral failing.
The real question becomes, how to identify the pattern of mistakes and how to fix them. Not the person. The mistakes.
Fix the mistakes. Create structures that help people be better then they were the time before. But calling mistakes a moral failing is a waste of time and not the way the world works.