...I hope this doesn't happen with deleting other users posts...
What did you mean by that? I try to but don't understand.
I think mod meant that each day forum mods have to check hundreds or thousands of reports from forum users (such as spamming, off-topic, whatever reports on bad posts). Then, if there is only one option for all (normal users and mods), they will have to spend more time when deleting bad posts reported.
That is why I suggest confirmation window (if implemented) should be an optional choice.