That's true. Still, isn't it too selfish to claim myself a better fit? For all I know, the other person is doing as good as me - how am I to decide that I'm better if we both possess the around equal amounts of the skill and the discipline that the new position requires? Would it be more or less selfish to decline answering the boss' question or to answer it with "It musn't be up to me to decide" or "Let the results of our work decide for us"?He's got no reasonable expectation that you should do otherwise.
Do you believe both of those technologies to be a product of reasonable selfishness solely - or, rather, of advertising and selling oneself? It seems to me that either of those are used because they're a better alternative to something rather than simply better fit for everyone and everything. Certainly, there are situations where both bows and Hubski win - ranged combat and thoughtful conversations, respectively - but when declaring itself to be the better way rather than a better way for something, doesn't that make the declarers selfish beyond reason? In the same manner, does declaring oneself to be better than others or best publicly make one's selfishness somehow harmful to others? If your point is to sell yourself, telling about your overall goodness of a product might help you but will harm others, for they're now unable to sell themselves, - which is fine while reasonable selfishness is concerned, but what about lying about your qualities?
Well there's a difference between recommending yourself for a job and running around telling everyone you're superior to them. The point isn't to think you're better than everyone, it's to try to advance your own interests, often at the expense of someone else who was trying to do the same thing or something incompatible with what I'm doing. Everybody acts in their own interest competitively and we're generally left with the more feasible solution, though maybe not our favorite one. Not always, though, which again opens up vulnerability to those plans. I don't even think you'd get past foraging societies without this sort of selfishness. You certainly wouldn't have civilization on the scale that we see it today. Not in human beings anyway. For that matter, though, I don't even know that a mobile species can survive without some degree of selfishness.