'why a gay section and not a heterosexual section?'
There is 'Naturist' section - There is no section for 'People who wear clothes'.
There is a 'Houseowner' section - There is no section for 'People who don't own houses'.
There is a Disability section - there is no section for 'People without disabilities'.
Maybe some of the rest of us would like to meet somebody nice for fun.
People use 'General Chat' for that. Given the level of hysteria and hatred shown by some in this section, can you imagine the 'Moral' outrage if gays tried to arrange meetings in the General Chat section.
This section is clearly labelled. If you don't like it, don't read it.