It's A LOT of women who can't. Makes them feel inadequate, which is sad. And what about the ones who decided not to by choice? They can't just turn that crap on on demand. I'd guess that those two groups combined constitute a good majority.
Again, no problem with the ones who legitimately can't, the problem is with not encouraging mothers who can to do so. Also most mothers who could but didn't and still have children nursing age still can, it may not be easy but it can absolutely be done. It takes milk ducts a very long time to completely dry up and even if they were completely dry women could take hormones and get on a pumping schedule to get a supply going.
Also, again if we're not going to be PC, which I refuse to on this issue, there are women who are told that they can't when they absolutely can. The availability and ubiquity of formula has led to a lack of effort in solutions. I know this is absolutely a privilege we had that others don't, that's a whole other health care conversation, but when we had our first child her and my wife didn't leave the hospital for three extra days because we were exclusively working with a lactation consultant. She was also an emergency c section so it was very traumatizing for my wife that she couldn't nurse her kid. We were in the hospital for a week and tried so many methods to get her to nurse. I fed her with a tube attached to my pinky at one point. As cool as I thought that was, it was complete torture for my wife. We finally got to the point where she could at least latch and they discharged us, but it still took my daughter a few months before she could nurse consistently. My wife just had to keep pumping and taking pills to keep the supply up. Not helping women with nursing is the part and parcel with thing of not letting women carry their babies until the baby is ready and scheduling c sections and inducing labor on a schedule, all under the guise of efficiency and not what's actually best for mother and child.
It's so frustrating because there are women and babies who need the formula. We have a broken health care system. We have a system that allows a solitary company having a recall that throws an entire industry into disarray, one that helps us to feed our children. No one is interested in fixing this crap, just crying to they media about it and politicizing the issue, it's frustrating.