That's right on the mark. It will save you a little bit of work on tasks that aren't the bottleneck on your productivity, and disrupt some random tasks that may or may not be important.
It's makes so little difference that plenty of people in 2025 don't use an IDE, and looking at their performance from the outside one just can't tell.
Except that LLMs have less potential to improve your tasks and more potential to be disruptive.
Even for writing tests, you have to proof-read every single line and triple check they didn't write a broken test. It's absolutely exhausting.
How can it be that people expect that pumping more energy into closed systems could do anything else than raise entropy? Because that's what it is. You attach GPU farms to your code base and make them pump code into it? You're pumping energy into a closed system. The result cannot be other than greater entropy.
The reason LLMs fail so often are not related to the fundamental of "garbage in, garbage out".