Yeah, when my first baby was five months old, I felt that way too. Everything was going so well and I just couldn't get my head around why it wouldn't go that way for almost everybody.
I wound up feeding my second baby formula. I looked back on what I thought when my first was small, and wow, I was smug. And a jerk.
Looking at my kids, I don't think anyone would be able to tell which one had formula in infancy. In that particular way, food is food.
I suppose my biggest complaint is just with that statement "food is food," just makes me think of people who pick up whatever off the shelf without looking at the ingredients thinking that it's all the same. It's not even that BFing and formula are the same, I'm sure there is stark differences between different types of formula as well.
True, but there's arguably a substantial difference between milk based, and soy based, and while some of the newer innovations are improvements, it can also be argued that their long-term effects have been less thouroughly established than the older versions. Formula isn't evil or anything, it's food, it will meet a baby's nutritional needs, but I do agree with the OP that there's good reason to put a little thought into which formula to use if it's going to be used.
For the record, I am pro-breastfeeding, but I am a foster parent and must use formula. I've bought pretty much all of them, depending on the needs of each situation.