Moderators sometimes have to delete posts and sometimes a lot of them in one go. It would take double the time if I had to confirm the deletes and a lot of the time I just open the post I want to delete in a new window. This probably wouldn't work if I had to double down on them.
Ok now I understand you correctly and what you think about this, as a solution to the above problem:
What if there is an option in profile page...users who want to use that option (pop-up confirmed message when deleting posts), can tick in the check box and activate it.
Moderators or normal users who don't want to use the option, just don't tick in the check box.
I think this is a great idea. Just add such an option in the profile page settings.