I think it is the fact that women think it will all happen within the first couple of days...(i actually thought the first couple of hours ) and when it doesnt they feel as though they have failed (i know i did).
I got so stressed that i couldnt breastfeed i was a hysterical mess and gave up after 2 weeks because DS wasnt latching on correctly and i had terribly cracked nipples.
Having only 4 weeks to go with DD i have done alot more research and asked for refferals to breastfeed clinics and lactation consultants.