"Sick" also reveals that Neuman was abandoned the same way Marie was — hemokinesis is certainly a power destined to manifest in horrible, uncontrollable ways before proper intervention and training can take place (see the series premiere of "Gen V," in which Marie accidentally murders her parents). Though we don't yet know exactly what Neuman went through, her experiences are likely what informed her decision to hide her powers from the world and to only use them in reserved, discreet ways.
This discretion is only becoming more important for Neuman since she's running for vice president, although it will also continue to be an ace up her sleeve to be used strategically. Self-defense or the need to employ force aren't the only instances when this gift has proved useful — as Neuman exhibits in "Sick," coming clean has the potential to gain her a quick and useful ally, depending on the person.
As "Gen V" sets up conflict between humans and Supes, it wouldn't be surprising if Neuman somehow used the revelation of her powers to gain support from the Supe community. To what end, fans can only guess until Season 4 of "The Boys" hits Amazon Prime.
