I like the point about the need for some type of external competitive measure but as you say, they might not be a MMA gym where you need one.
Shifting the metaphor, I think your observation of the sucker punch fits well with the insight that for those with only a hammer, all problems look like nails. The gym would be someone with a screwdriver or riveter as well as the hammer. But even lacking the external check, we should always ask ourselves “Is this really a nail?” I might only have a hammer but if this isn’t a nail while the results might be better than nothing (maybe?) I’m not likely to achieve the best that could be done some other way. And,of course, watching just what happens went the other hammer-only people solve the problem and compare results to those when we know the problem is a nail we might learn something from their mistakes.
The desires-values schema reminds me of Hirshmann’s The Passions and the Interests and the problem he (IIRC) sees Machiavelli dealing with. Machiavelli is advising kings who he sees as more driven by their passions but to be successful need to be driven more by their interests.
Anyone in the alignment space take a look at Machiavelli in the light of how to get some thing that is more powerful (king versus the advisor) better aligned? Probably need to stretch things a bit to see that type of alignment as being aligned with the general welfare of the kingdom but seems like he was dealing with a similar problem when looked at from certain angles.