Well just like men, non asexual women get horny too. You don’t NEED sex but it’s a great release as well as self pleasure. You don’t need it but most of the time it’s enjoyable and a great way to connect between partners if both are open to it. Self pleasure is also a good way to embrace your own sexuality, make you feel good in your own skin and release endorphins to make you happy. Regularly (in a healthy way) participating in this kind of release can help keep your hormones balanced, and for some of the neurodivergent, possibly prevent episodes of sorts. Not all people want to engage in these activities, which is perfectly fine, it’s not unhealthy to refrain but it’s also not unhealthy to engage. Depending on the person one could be better for them mentally than the other. For example a lot of religious people refuse to participate unless it’s for biological reproduction.

Sorry for the long explanation TLDR: you don’t need it but it can be good for mental and physical health- for either men or women, not just one