Yeah it’s definitely a stereotype that is perpetuated by lower-scale kinsey bisexuals because they tend to always dominate the conversations and visibility of bisexuality as well as uneducated straights and gays who say “if you’re mostly same-sex attracted then you’re gay in denial”. Which leads to these bisexuals identifying as gay/lesbian and further erasing themselves and fucking up everyone’s understanding of homosexuality and bisexuality in the process. Idk how it is with bi men but that’s what I’ve seen happen with lots of bi women. It’s kind of a vicious cycle unfortunately.