>They are also great at doing boring tasks for which you can provide perfect guidance (but that still would take you hours)

All the tasks I can think of dealing with on my own computer that would take hours, a) are actually pretty interesting to me and b) would equally well take hours to "provide perfect guidance". The drudge work of programming that I notice comes in blocks of seconds at a time, and the mental context switch to using an LLM would be costlier.