Whether you believe bisexuality was inclusive of nonbinary people in the 1960s, or whatever the latest debate is, the fact is that the bi community has spent the majority of the last decade trying to make it clear that bisexual means or should mean much more than just “attraction to men and women”, and there has been very, very little push back from within the bi community. The general consensus is that the word “bisexual” should be infinitely broad and inclusive, no matter what the etymological root is. Bisexuals do not want “bisexual” to be limited.

The only people desperately trying to reinforce the idea that “bisexual means 2 genders” are people who do not identify as bisexual.