Monocosmology (an entire world with one worldview or one religion) is both unrealistic and a lost opportunity for complexity and conflict. Three-dimensional humans are complicated, as are our relationships and societies.
Geography is similarly varied and creates a multiplicity of ecosystems (even in Star Wars, the desert planet Tatooine or the Forest Moon of Endor should have microclimates within the larger monoclimate).
(attracted to both binary genders), and pansexual (attracted to all genders) adds depth to characterization and breadth to created worlds.
It can also be interesting to think of sexuality as a continuum, rather than a discreet label.
“Marginalized people often have a culture invisible to the dominant one.”
History is easiest to reconstruct from written sources, which leaves out a vast swathe of oral cultures. For example, “Greek” history is often based entirely on the literate aristocracy of ancient Athens, which was only one of many city-states on the Greek mainland and abroad. The Athenian written record also provides little to no insight into the lives of women, slaves, or foreigners who comprised the majority of the population.
I don’t live as a racial minority, and therefore am not comfortable writing (appropriating) that experience.