Just another example of these people being obsessed with words while at the same time not actually knowing what they mean. For something to be a spectrum, there by definition must be people at either end of it. Otherwise it's not a spectrum.

For example, political leanings. There are people at either end who are very left or right-wing. Then there's everybody in between. But if everyone were in between, there wouldn't be the need for the "spectrum" since everyone would just have varied opinions and there would be no hard lines. Just like with the autism spectrum: if there aren't any non-autistic people, why would we talk about an autism spectrum? That makes no sense.

I'm willing to wager that there are far more bisexual people in the world than those who identify as such. But I'm also willing to bet that the vast majority of them identify instead as straight, at least until recent woke shenanigans. Think about it, if you were bi, why would you come out as gay or lesbian historically when you had the potential to be attracted to the opposite sex and not face persecution? The fact that gay men and lesbians have existed even in the darkest periods of history is proof enough for me that there are people who are exclusively same-sex attracted.