I think there are a few instances where mentioning your own inability or failures are ok. One would be where it's qualified with like, appropriate measures to ensure it doesn't happen again.

Like if I say I'm flawed and not perfect, it makes sense to think something like this might happen again and hey here are the mechanisms or things in place to ensure my non-perfectness can be addressed and mitigated so as to cause the least amount of harm for others (at my own expense).

Of course this is not at all what was done or what tends to be done :/