Advanced is a very subjective term. Toys define advancement? I believe that any society that can exist in balance with nature is more advanced than our destructive society. Nearly every "Marvel" that we enjoy comes because of our war culture. From cell phones, telecommunication, Internet, GPS, to miracle medical procedures, trauma treatments, prosthetics, etc., all have their roots in war, a concept not very advanced at all, IMHO, and all destroy a piece of our shared environment to produce and maintain.
That being said I noticed that you deftly attempted to ignore the fact that full or partial nudity in these cultures is not distracting, nor does it "fuck with natural impulses".
I would also say that there are more sexually distracting and destructive influences in our culture than women's nipples.
Just for fun, how about make-up? What purpose does it serve to darken the eyes, color the lips red and make them shiny, blush the cheeks, etc? HMMM. All of those imitated effects occur during sexual arousal and orgasm.
Where is your outrage over cosmetics?
Next what about push up bras, lingerie, low necklines and high skirts, tight pants, or heels?
Enhancing and or displaying all of what our society defines as the sexual areas. Everyone I have ever known is distracted by camel toe... No outrage over the fashion industry?
Seems to me that these "sexual triggers" (interesting terminology) are much more prevalent and to me are much more effective than displaying breasts.
Take off the bra and cleavage usually disappears, the breasts hang, remove the make-up and blemishes, pale eyes, cheek and lips are obvious and less attractive for the men indoctrinated from birth into our society. Take off the high heels and stockings, don't shave the legs, and the buttocks are less enhanced, the legs are hairy and appear shorter. Where is the outrage about high heels or women displaying shaved legs?
If we are to remove every possible "Trigger" for males in our society, then I guess we should start mass producing netted burqas, or maybe we should lock the females up at home, deny them the right to travel exposed and unescorted?
Or maybe we should not allow females to ever be in public at all, some guys may be triggered by the burqas after all, and since you seem to believe we should be legislating the appearance of the females (The triggers), not the actions of the males (response to personal Triggers), it is the only logical conclusion I can come to.