It certainly seems that there was an intentional decision to disband departments in the military last year that were intended to confirm targets are appropriate before a strike (although I can't find a reference now). There's also a lot of reporting that they used AI to do the targetting selection; if so that was an intentional decision to allow for poor selection; especially since it doesn't appear there was validation of targets. There's a lot of intentional decisions to make comments declaring 'no stupid rules of engagement' and such.
I think it's most likely that the intentional decisions led to the situation where the targetting of a school would not be noticed until after the school was hit and international outcry was made, but that doesn't mean it was not a targetting mistake. You can certainly hold people accountable for the decisions that lead to the targetting of a school, at least in the court of public opinion since there's an accountability vacuum in washington DC lately.
There are many examples of targetting mistakes that are excusable. I don't think this is one of them; but that it is inexcusable and was the result of intentional decisions doesn't make it necessarily an intentional act and not a mistake.