I've got a few train of thoughts running at the same time, so I'll try to put down a couple of points and hope that they make sense, lol.
We are all living in a society where FF has become increasingly common, and breastfeeding (especially extended breastfeeding), is less common than it used to be. I think that when a woman succeeds at breastfeeding they are often very proud of what they have achieved (rightfully :) ).
Unfortunately when a woman that has breastfed talks about her achievement, it can often upset and hurt someone that has FF. I think in the majority of cases it is probably unintentional. And while I believe that the FF mothers have nothing to be guilty or ashamed of, I can understand that they may feel that way when the motto of "breast is best" is announced so often. But at the end of the day, most FF mothers have done what needed to be done in the "best" interest of their child and they should be proud :)
I don't think that we (as a society) should stop promoting breastfeeding as the "best" way to feed a baby. In most cases the FF mothers probably would have loved to have been able to breastfeed and I'm sure they agree that it would be better if we could increase the number of children that are breastfed (and breastfed for longer). This should be done through education and the healthy promotion of breastfeeding. It's for this reason that I breastfeed regularly (and proudly) in public, am a breastmilk donor, and am happy to announce that I am proud to breastfeed.
Having said that, I am always careful with my language around FF mothers and make sure that they are aware that I in no way think they are doing anything wrong, because they certainly are not.

