Formula may not be my personal preference but I see no reason for you for to feel guilty about it.
I can't claim to relate to the emotional challenges some FF mums face,I fell on the breast side of the fence by luck rather than skill or virtue. It was just easy to feed my DD and I learned to love BF from that.
But I do have some intuitive sense of how it feels when your choice isn't the most socially accepted and/or not advised by the majority of health authorities in this country.
I co sleep with my newborn son. There is much research and or discussion to suggest that this is not the safest sleeping environment for him. SIDS advises that he sleep in his own space in my room, not in my bed. Other mothers give me 'that look'..
Do I shy away or reject this information because it frightens me & challenges my choice?
Absolutely not! I seek out this research and go over it with a fine tooth comb so that I can make my choice as safe and beneficial as humanly possible for him. I want to know everything I can because it allows me to perform the most accurate risk/benefit analysis for my family.
This information isnt there to cause me guilt or distress, these uncomfortable truths make me a better mother. I see no value in shushing discussion lest we inadvertently offend someone.