Blue team is a lot easier than red team, and as part of that, code tasks are easier than social engineering. It rarely comes up in investigations, but you do need to set prompt persona for simulating attacks.
At the same time, fine-tuning a model is a pretty clear way to undo needing to do even that.
We benefit from models having business-neutral alignment by default -- the typical case suffers if the default persona was a racist forum troll with extreme politics. So it's more about when you want to turn that off for specific tasks. It's more work than we'd like, and gotchas like changing when models update.