Why would a person even give a microseconds thought on whether or not I was white, black, male, female, whatever, and even if they do -- why is it _my_ responsibility as person putting the content out there to be one or the other?
It's not.
You're right one one point - programmers do consider themselves to be rational. IRC is one place where biases simply don't exist by definition, because why would they? Nothing defining anything exists unless you explicitly want it to.
I find it extremely irking that you keep trying to insinuate that literally every person on IRC thinks of each other as a 'white male' like you describe. This reveals a problem, not systemic, but in yourself.
I believe his point is he realized that technology alone does not obviate sociological issues, after being confronted with his own bias in an unanticipated way.