People have the privilege if deleting in order to be able to remove posts that need to be deleted. This is a quasi-moderation privilege so treat it with the same respect we do.
If we're talking about questions, the close system should be used first. This allows a poster to revise and reopen their question. And closing it without answers or positive score will see it automatically deleted. Duplicates feed into a SEO system which deleting can hurt.
If we're looking at answers, there's a bit more to do here in that it's far more common there's a "non-answer" posted in the answer section than a question asked that needs to be urgently deleted.
Save your votes for things that cause harm.
Leave the "does no good" for the system.
