Please help me understand breastfeeding and guilt

Please know that this post is not directed at anyone in particular. I genuinely want to get a better understanding about why some women feel guilty about having to give their baby formula and/or not being able to breastfeed exclusively.   Through Fb postings by Fed Is Best, I learned about a woman who accidentally starved her baby to death because she breastfed exclusively and didn't realize she had inadequate milk supply. Why wouldn't her lactation consultant have her pump at least once before discharge so she could measure milk output? Is it common practice in hospitals to tell women they should always breastfeed no matter what?

Why would a mom feel guilty about not being able to breast feed through no fault of her own? When the child grows up, if they drink milk, it won't be breast milk. So why is it ok to drink alternate milk at later stages in life, but not ok for babies?

 No one in my nuclear family breastfed. I also have a super small family, so I didn't have a large sample size of women to observe. My mom was bottle fed and she was born in the '50s. Until adulthood, my only frame of reference for infant nutrition was that babies drink formula. 

A few years ago, I read somewhere that breastfeeding can prevent babies from developing food allergies. However, I thought that was only anecdotal as my dad and uncle were breastfed and they are deathly allergic to eggs, fish, shellfish, nuts, a bunch of fruits, and environmental allergens. *I'm not that close with that side of the family, so when I said my family earlier, I mean my maternal family* Anywho, my paternal family members have to use epipens and everything. One of them will have a severe reaction if he is in the same room with fish being microwaved. I was never breastfed and I'm not allergic to anything, despite both of my parents being allergic to shellfish. Therefore, I always thought formula and breast milk were equally beneficial.

 I only recently learned how vital breast milk is for preemies. While I do understand breastfeeding is a bonding experience in addition to a feeding method, I don't understand why anyone should feel guilty if they can't breast feed or if they just choose not to breastfeed. What is the genesis of the guilt mothers feel if they can't/don't breastfeed? Does it come from doctors and hospitals after birth? Does it come from family pressure? Is formula really dangerous or is it just not as nutritional? Do moms put pressure on other moms if they don't breastfeed? Does the guilt come from having plans to breastfeed and then learning that you're unable to do so? Is it guilt internally driven by personal expectations?

I hope this post doesn't offend anyone.  I'm asking these questions out of a genuine lack of l knowledge. I don't have any living children yet, but I am trying to soak up as much knowledge as I can while TTC my rainbow baby. 

I made the decision to have a breast augmentation to improve my appearance with the knowledge that I probably wouldn't be able to breastfeed. I don't regret my decision at all as it has made me feel more feminine and look more like the rest of my family. I come from a long line of naturally busty women on both sides of my family. I'm the only one who was flat chested. They all hated having big boobs, while I envied them. Although I am very happy with my current boob situation, I do understand I totally defeated the actual purpose of having boobies in the first place. I can see how someone in my position, might feel guilty about not being able to breastfeed in the event their baby was born with medical needs for breast milk and they couldn't produce. I can't breastfeed because  of a personal choice I made, but I just don't understand why natural moms would feel like they are a letdown or less than because they are unable to breastfeed through no fault of their own. 

I really want to understand maternal guilt regarding breastfeeding. Please, please, pretty please comment and share your thoughts on this.  *extra baby dust to all my TTC sisters who made it all the way through my ramblings.*