Never let anyone claim society does not care about an issue unless it involves slavery or laws or lynching. "Heightism doesn't matter because racism, sexism, and homophobia are worse". Okay, then what about this?
If someone says "society only cares about an issue if it affects women," then I'll be the first to agree. Anything else is just an excuse. Give one reason why women's weight standards are a big deal but height prejudice is not.
Update: Apparently, universities also have a 'fat studies' course about the discrimination fat women face.