We've Always Done It That Way

Here's an excerpt from one of today's meetings:

Me: Your writer created this content incorrectly.
Them: Our writer has created this type of content before, and they followed the same pattern as last time.
Me: Let me put this as delicately as I can - if you did something wrong the first time and you continue to do it wrong every time after that, then telling me you did it the same way as last time doesn't mean anything to me.
Them: O_o