Homophobia is currently defined as not advocating the homosexual lifestyle as superior to all others.
Anyone who is heterosexual meaning ONLY having sex with opposite sex partners will be defined as being aberrant. They are going more to the “fluid” definition of sexual identity, they are trying to expand the many options and they are inventing a lexicon of their weird definitions. If you believe people come in the male and female sex you are following the “binary” understanding of sexual identity and you can be sure that this “binary” definition will be pushed to the margins of what is acceptable.