Wouldn’t that be an unforced error?
I think if we're using it in a non-sports context, "own goal" and "unforced error" are both appropriate.
This is the politicians fallacy:
>We need to do something.
>This is something.
>Ergo we must do it.
I can obviously think of any ways they could have done things worse. I can also think of many ways in which they could have done much better.