Except that sexual orientation and romantic relationships are entirely centred around sexuality rather than gender. Ergo your point here is moot.
Amicitia certainly, however eros is a fundamentally different situation; that's the dist8nction you fail to grasp.
You do realise that 'being progressive' in recent hostory has included things such as eugenics, Social Darwinism, The Stolen Generation and The Holocaust, don't you (