The argument that "GitHub isn't a useful indicator of skill" has the logically-following argument "we won't look at GitHubs at all because they're a waste of time." Which is a loss of helpful information for hiring a candidate, and ignoring relevant information seems inefficient.
Nobody actually wants to make the most informed decision, what they really want is to make the right decision. There's all kinds of places where additional information leads to worse decisions:
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The argument that "GitHub isn't a useful indicator of skill" has the logically-following argument "we won't look at GitHubs at all because they're a waste of time." Which is a loss of helpful information for hiring a candidate, and ignoring relevant information seems inefficient.
Nobody actually wants to make the most informed decision, what they really want is to make the right decision. There's all kinds of places where additional information leads to worse decisions:
https://ignoranceanduncertainty.wordpress.com/2011/01/31/whe...
So you may in fact want to ignore relevant information to be more efficient.