Re: I'd guess along the lines
seem a bit daft. They had problems with their system that this drill uncovered - some of them sound like problems they might have predicted but still it's better to know about them than not.
That is my thought on it. This is why we test; not to fill out a checklist that says "we tried this, it worked", but to find where things break. If you haven't broken something by the end, you haven't really tested anything.