Hi everyone, what an interesting thread
I think that women should definitely be entitled to say they don't WANT to breastfeed. It's a bit like admitting they used an epidural by choice, to avoid the pain of labour (as far as possible). It seems to me, by reading these threads, and through my real life experiences in these things, that women often have to give horrendous, detailed explanations of difficult births (leading to epidurals) or problems in bf (leading to quitting). But women are not martyrs, they should be entitled to make choices (even unpopular choices) & they shouldn't be asked to give reasons for their choices (as long as they don't affect others). Personally I've tried hard to breastfeed, and am still bf-ing my 5 month old, and I never have felt I need to justify my choice to anyone- and believe me, in certain circles breastfeeding is also not acceptable & lots of people (e.g. family) have put pressure on me to stop bf-ing because 'my baby needs thicker milk'. So this kind of justification required can go both ways.
As for the research about obesity, IQ, bonding etc. I'm a psychologist myself & even though I completely accept breastmilk has many benefits- especially having to do with antibodies & immunity- I seriously doubt the research on all these wide, complex issues like IQ & obesity. This is a huge discussion & perhaps this forum is not the best place to get into this, but just to say that 'science' is not one thing, undisputed by all, there are many different types of science & many different types of research, & 'controlling' for this or that is not necessarily a protection against bad research. To be honest, I fail to see how formula feeding can be convincingly linked to obesity, the research quoted has lots of holes in my opinion, but as I said, this is a different discussion.
On the other hand, I agree with what Penthesileia wrote. Formula feeding can be a real problem in countries/areas where sterilized water is not easily acquired. Also, disgust for the female body (and breasts used for feeding) is another very real underlying reason many people choose not to bf. I don't blame anyone for making that choice, motherhood is hard enough to be forced or guilt-tripped into doing something without feeling comfortable about it (after all that's a sure way for an unhappy baby). However, these attitudes & ideologies should be worked on, on a society-level, and perhaps they might explain the strong views held by many breastfeeders (like myself) who find themselves having to hide when feeding in public etc.
Finally, someone said 'breastfeeding is the completely natural choice' and is 'best for baby'. I disagree with both these phrases. What is natural is very debatable, especially in 2009 when we use technology for all sorts of things (health issues included). Also, what feels 'natural' for one mother may feel completely 'unnatural' to another, leading to breastfeeding in some cases being just wrong to particular mother-baby couples. So no, bf is not always 'best for baby', nor is it always 'natural'. And women should NOT be asked to justify their choices either way.