I am sorry for what she is/was going through. It must have been heartbreaking.

Having said that, I would wager a guess there was some other issues going on, as well. PPD of this magnitude strikes something like 4% of the population. It isn't the majority.

Maybe what is important to take from this is motherhood/fatherhood is not easy. It might not come naturally to some, and it certainly has its tradeoffs. Some may not want it, or take to it, or live up to it.

To suggest, however, that this is the 'norm' isn't realistic. That would be like suggesting anyone that is a social drinker WILL become a wanton, irresponsible, harmful alcoholic. It CAN happen, but, it doesn't HAVE to happen.