Yep. Psychiatry (or most of medicine really) is not trying to bring everyone up to the top 10% of the population, or even the top 50% along some dimension of interest. Psychiatry is mainly trying to move people from the bottom ~5% (what we call a "disorder") to the top ~95% of the population - which is then considered normal variability. So, if you take for example extraversion/social skills, then many "psychiatry-healthy" people will not be good at this at all, will make fewer connections, will not ask for raises, will be skipped for promotion, will have weak social support structures if shit hits the fan, etc. That's just normal trait variation.

I think a really good example of this is self-diagnosing with bipolar disorder (and thus mania). Let's forget for a second that mania must last at least a few days non stop; most people do not notice this part somehow :). If you read the DSM criteria you may think that you actually fit them sometimes: elevated/irritable mood, highly talkative, distractible, flight of ideas, ... . However, you probably don't, and it is mainly a matter of understanding the scale of the problem. Most people do not know just how wide the range of "mood" is in humans, and what does it mean to be on either of the far ends of it.

(percentages are much more illustrative than accurate)