I agree with you on the examples listed, there are much better tools than an LLM for that. And I agree no one should be copy and pasting without consideration, that's a misuse of these tools.

I'd say my main uses are kicking off a new test suite (obviously you need to go and check the assertions are what you expect, but it's usually about 95% there) which has gone from a decent percentage of the work for a feature down to an almost negligible amount of time. This one also results in me enjoying my job a bit more now too as I've always found writing tests a bit of a drudgery.

The other big use for me is that my organisation is pretty big and has a hefty amount of code (a good couple of thousand repos at least), we have a tool that's based on GPT which has processed all the code, so you can now ask queries about internal stuff that may not be well documented or particularly obvious. This one saves a load of time because I now don't always have to do the Slack merry go round to try and find an engineer that knows about what I'm looking for—sometimes it's still unavoidable, but they're less frequent moments now.

If LOC/min or a similar metric is used to measure efficiency at your company, I am genuinely sorry.

It's tied to OKR completion, which is generally based around delivery. If you deliver more feature work, it generally means your team's scores will be higher and assuming your manager is aware of your contributions, that translates to a bigger bonus. It's more of a carrot than a stick situation IMO, I could work less hard if I didn't want the extra money.