Surprise girls in documentation

Why do neckbeards writing technical documentation always have this urge to refer technical people as "she" in their text?
It happens so often an ignorant observer might conclude that computer stuff is a secret girly club no boys allowed.
It always seem so transparent that they mean "WELL SEE HOW I MENTIONED CUNTS HURR I AM SO PROGESSIVE DESPITE BEING ONLY THREE PROVEN WOMEN IN MY FIELD OF EXPERTISE [spoiler]AND ONE OF THEM BEING LEAH CULVER[/i]" with their refusal to use the default "he" or the fancy (and possibly gay) gender-neutral "they".

>>1
Guess which ONE is correct English:

1) One can then implement the counter.
2) They can then implement the counter.
3) She can then implement the counter.

It's a trick question. ``They'' is only incorrect when dealing with a singular; ``She'' is only incorrect when dealing with a person whom is male or of unknown gender.