The crux behind the idea of being better than average at two things makes you individually extraordinary is that the two skills are not correlated. An above average singer is probably an above average player of one or more instruments, but I'm sure there aren't many who are also great ice cream makers.
Oh how I wish that were true
> The crux behind the idea of being better than average at two things makes you individually extraordinary is that the two skills are not correlated.
I don't know if "almost all CS people" come from better schools than mine, but I've never had a proper statistics course, and my degree has a "data science" stamp on it. Having good statistics skills, and not just good knowledge of some machine learning frameworks, is probably rarer than you think.
How do they justify that? ML is not IMHO the same thing, but maybe times are changing?
I wondered if my degree was an exception.
Nobody said being average at both was enough. The parent post specifically said if you know more than average in both areas. You still need to be good, but the combination of good in multiple areas is claimed to be sort of like being extraordinary in one. I think there's some truth in that.