> I see so many of my colleagues using AI not only for their job, but even for their week-end programming projects

When writing code in exchange for money the goal is not to write code, it's to solve a problem. Care about the code if you want but care about solving the problem quickly and effectively more. If LLMs help with that you should be using them.

On personal projects it depends on your goal. I usually want the tool more than whatever I get from writing code. I always read whatever an LLM spits out to make sure I understand it and confirm it's correct but why wouldn't I accelerate my personal tool development as well?