I don't think they're rarer per se-- at my university about 60% of the student body is female so I'm pretty sure its not an issue of gender. I think, more than anything, females are better at suppressing their power levels. Most normal intelligent females, like my younger sister, can hide her intelligence extremely well, and its probably for this reason that's she's sometimes able to get away with murder around strangers. This is not to say that she doesn't prefer being around intelligent people, just that she can hide it well enough to relate with anyone.
The reason why I'm irresponsible-- hrm, tough question. My younger sister and I share some escapist tendencies though mine are much more severe than hers and at a moment's notice she can rebound from her depressive periods whereas I dwell much deeper and longer in them. I could blame it all on my bipolar diagnosis, but I know that's pretty much bullshit so I won't.
I think what keeps me so unproductive is really the lack of a social life. Its so hard and painful doing productive things when you cannot relate to anyone you work with, and its rather disheartening to know that your best efforts in life won't be rewarded with a loli or some kind of sexual incentive.
Eh, I'm probably still not being honest. I know its not laziness since I'm one of the hardest workers at my part time job. I think, honestly, that it all boils down to expectations. My expectations have been set extraordinarily high due to my heritage and whatnot and unfortunately, my circumstances have set a limit on what I can accomplish. In trying to reconcile the two, I reach an impasse where I wonder whether I should persist in doing the "right" thing by studying, endlessly carrying my burden up a hill only to have it roll back down again like Sisyphus, or if I should just give up and spend more time fapping to my waifu. I hope that answered your question.
Pic related, yes I got trolled thank you very much.