Sometimes refactoring tools are not enough and you have to do the same change in couple of places. Boring, repetitive work. For example last thing I did is that I refactored some code and I had to change the way objects used in tests are initialized. Basically couple hundred lines of just constructors and setters. I knew exactly what needs to be created because tests where there so I feed the expected structure into a LLM and it generated the code. Saved me some boring work and I didn't have to worry about mistakes because compiler and tests would pick it up.

It's worth noting that good IDE integrated agents also have access to these deterministic tools. In my experience, they use them quite often. Even for minor parts of their tasks that I would typically just type out.