Dittos aren't actually that easy to obtain, anon. There's a smallish chance of finding one on that out-of-way garden this Gen and that's it. Excluding friend safaris. Pokemon is still a game for kids. I would've had a hell of a tine getting a ditto if I was 10. Until my friend who bought the guide or whatever told me.
That said, with more guides on the Internet and the use of the GTS, it's still really easy to get a Dito and breed a way. The gender ratios are mostly an artifact at this point. Does make it a bitch to breed egg moves and hidden abilities though.