Feeling dismissed

Why do lactation consultants and some moms always tell me it's "extremely rare" to have a low milk supply when I express concern about mine being low? I feel as if they're telling me that I'm just not trying hard enough or doing enough to build it up. I breastfeed my baby and also pump to help boost stimulation 10+ times a day, stay hydrated, etc and still not enough. I eat the oatmeal and drink the mothers milk tea. I'm so tired of hearing "oh it's rare to have low supply" and "your body will make enough." Well it isn't. I feel like my concerns are dismissed and invalidated when I try to voice them. 😢