I wasn’t going to be curing cancer regardless so I am not sure I fully understand your point. Like most people reading this forum I am a relatively normal person who has a comfortable life but will be doomed to obscurity with no notable achievements when I die.
I use Codex for work, and I feel like I accomplish more with it than I would have without it. I juggle a lot more projects concurrently and can broaden the scope of what I am doing.
Now we can argue what I do is “easy”, and you’re probably not wrong, but most white collar work is pretty easy and being able to accomplish more easy tasks is still potential productivity.
For that matter, if I am not distracted with the trivial tasks I can dedicate more of my time working on hard problems, maybe even ones we would call “important”.