I think this is true for the very simple cases, for example and obviously bad picture vs. a good one.
I don't think this is necessarily true for more complex tasks, especially not in areas that require deep evaluation. For example, reviewing 5 non-trivial PRs is probably harder and more time consuming than writing it yourself.
The reason why it works well for images and short stories is because the filter you are applying is "I like it, vs. I don't like it", rather than "it's good vs. it's not good".
I don't think this is necessarily true for more complex tasks, especially not in areas that require deep evaluation. For example, reviewing 5 non-trivial PRs is probably harder and more time consuming than writing it yourself.
The reason why it works well for images and short stories is because the filter you are applying is "I like it, vs. I don't like it", rather than "it's good vs. it's not good".