All of this is true, and so disheartening.
I have always hated phrases like "just friends", and the idea that non-romantic relationships will never reach quite the same level as romantic ones. Infuriating, and false.
I am so lucky to have a group of friends who are deeply close emotionally, and all committed to building a life together, despite not being romantically involved. It helps, I think, that we are all likely autistic and tend not to relate to others in so-called "normal" fashion, but in any case I am glad for it.
This is an area where I appreciate the Chelouranyan conception of Amity (notable because I agree with very few of their ideas lmao).
Amae are those we love, closer than "friends", according to social convention, but not romantic or at all sexual.
These people are not "just friends"; they are my amae, my beloved.