There are many valid reasons why women can't physically or psychologically breastfeed but a lot of times nowadays women get inaccurately told they haven't got enough milk when in fact they do.

When DD was born she was a sleepy baby. For almost 5 days she only fed every 4 to 5 hours. I kept asking the midwives if that was normal and what I should do but none of them helped. My milk came in but production wasn't stimulated because she was feeding infrequently and wasn't attaching properly. When I sought help an LC told me I had to supplement with formula and that my breasts were "the wrong shape" to make much milk. Thankfully she was wrong and DD was exclusively breastfed for 6 months and is still being breastfed now. I don't blame any woman who gives up breastfeeding because she was told by a supposed professional that she didn't have enough milk. I thnk it really is a lack of knowledge and education by those who are supposed to help us that makes many erroneously think they can't bf no matter how much they want to.

BTW I was prescribed something, I forget the name of it sorry, by my GP that increased my milk production, in just five days I was bursting! I have also taken fenugreek occasionally when DD has been having a growth spurt and feeding more often. I don't know if it helped but it didn't do us any harm.