Earlier quoted context omitted.
The way I interpret the poem's message is that sometimes hiring can concentrate on the wrong estimators of ability, ignoring indicators that the applicant can open a can of whoop-ass.
Interesting - I interpreted it as how it feels to take rejection very personally - someone not getting the job feeling like there is something deeply wrong with themselves
Of course you’re not a fit for this role, why would you ever apply? We considered you before we knew who you were. But now we see you as you truly are. Monstrously unqualified. Your 15 years of experience in distributed systems is nice, but we’re really looking for someone who could invert a binary tree in 10 minutes, and, well, you were on track for 20+ before we kindly stepped in and asked if you had any questions for us.