I am not [yet] comfortable, working with agents. I work interactively, with a chat interface. It’s definitely made a significant difference, for me.
But the LLM regularly makes lots of mistakes (sometimes, due to me, giving it bogus information). I can’t imagine just letting it do the whole thing, as a “black box.”
I’m old enough to remember the advent of ATMs. When they first came out, they were universally free, for years.
Once people got hooked, the fees began to appear.