If a worker could be right 50% of the time and get paid 1 cent to write a 5000 word essay on a random topic, and do it in less than 30 seconds.

Then I think managers would be fine hiring that worker for that rate as well.

5000 half-right words is worthless output. That can even lead to negative productivity.

great, now who are you paying to sort the right output from the wrong output?