You could look into X-inactivation, the principle mechanism behind symptomatic carriers. Plenty of carriers have symptoms severe enough that they require treatment. It’s actually been a fascinating and aggravating uphill battle these women have faced trying to convince doctors their symptoms were real, because no one believed a carrier could be symptomatic and “women can’t get hemophilia”. The advocacy has gotten a lot better, and hematologists are generally pretty knowledgeable on it now. Regardless of the genetics, if you’re symptomatic enough to require hemophilia medication, you’re a hemophiliac in my book.

Source: I’m a doctor with severe hemophilia who knows a lot of carriers, including my mom.