This is a fair point; its not easy to objectively define value.

But I'd say to a first approximation, economic effort defined towards the pursuit of maximising arbitrary stats in a video game, is less likely to be valuable work.

That's really all I'm saying. Just because its hard to define objectively, shouldn't mean its a free-for-all, and that we accept that all activity is equally useful (or un-useful.)

We can and should use our judgement here.