I don't agree with the shame at all, and my personal opinion is it's probably better because it's cheaper and equipment-free as you say and years of evolution mean that it works well enough in most cases.

While looking into this though I noticed that a manufacturer's site (https://nutricia.com.au/early-life-nutrition/karicare.html) actually has a popup saying that breastfeeding is better. I wonder what prompted that, community outrage?