Grammaretto, thanks for coming back re "fad" and breastfeeding.
I suppose I'd never see any aspect of breastfeeding as a "fad" - any more than cuddles or hugs or wiping away a little person's tears.
I think I take issue with your use of the word "necessary" in this context too though. Much of what we do isn't strictly speaking "necessary".
Indeed, lots of people think that breastfeeding isn't "necessary" at all.
Also, what you mean by "extreme"?
Do you mean after 6 weeks, 6 months, after 1, 2, 3, 4, 5 years?
My knowledge of mums in America (all those years ago) was that most breastfed for year - a lot for 2 years or more... but there was lots of positive reinforcement of this as "normal" in a way that I've never seen here.