Teams who use agile mostly release on a set schedule not immediately. Getting that function a few minutes quicker but introducing a blackhole you don't understand but you hope works in production but can't rely on the tests AI made seems foolish.
I've had instances now where the code generated by copilot has saved me roughly an hour or more without turning into a can of worms. Your mileage is going to vary depending on the language and framework you're using.
For example, one instance for me was with winforms. I wanted to know how to recursively expand a list box. It's not a hard task, but it's just something that's tedious since I need to go research the documentation to see how a list box control actually behaves and what properties I need to manipulate. This is a very solved problem. What good is there in me re-solving it when someone has already done so?
That's where using AI is helpful without it being foolish.