Why does this sub hate demisexual lesbians

Genuinely what is the problem with lesbians who are demi? I feel like it’s not taken seriously at all and it’s really invalidating here. Whenever I had tried to post about or others try to post about it people downvote it to hell. It’s okay if you don’t understand it, but that doesn’t justify ridiculing it. I literally have not been able to have feelings for anyone in years. Can you imagine what that’s like? An allosexual can take a glance at a person and be overwhelmed with attraction. It’s just not fair that there is not much understanding towards people on the ace spectrum. As a lesbian you should know how invalidating it is when someone doesn’t take your identity seriously. You can accept non-binary people but not demisexuals? This is a sexuality that exists outside the binaries. Yet a lot of people are quite ignorant about it.