Lass, I think you are taking this very personally. Breast feeding does have many proven benefits, both for baby and mother - individual circumstances obviously change the benefit analysis.
Personally, I never thought I'd do anything else - I remember my mum breastfeeding my younger sister (although thinking back, I do remember bottles in the house for my brother too), and just assumed that's what I would do. I had a tough time with my first - I remember DP sending me to bed about a week in, and wandering into the kitchen after a blissful 4 hour nap to find him standing there, bottle with premix milk (freebie - not the uk) in hand trying to decide whether to wake me up, or try to feed grizzling DS1 the bottle. I had those hard weeks - bleeding nipples, DS losing 9% body weight - I found my notebooks the other day cataloguing everything to 10 minute intervals - probably formula would have been a good plan, but I was so far in the fog it didn't occur to me until DS figured it out and we all calmed down, and were grateful that for the next few months I could just pick up and leave the house without worrying about bottles - given I have trouble keeping enough clean mugs for a cup of tea! (and contrary to people's experiences here, I've never had anyone pressure me to feed in any way - formula or breast, in the UK or Canada).
For everyone, there are pros and cons and it's up to you to decide. In this, feminism is about choice.
I do think it's a profoundly feminist act to feed a child from your own body, but it's also completely feminist to ensure your own health, by formula feeding if that is what you want to do.