What is up with het and all big tiddy mary suu’s?

I ain’t complaining I love the bazookas, but why don’t they give love my small chested ladies too? Men in BL and women in GL seem to have so much variety but when it comes to het they all seem to have factory default body & face type? Maybe I need to expand my horizons and pull out the file cabinets to find some ancient relics.
(╯︵╰,)