Why is the C word considered move offensive in American culture than Australian?

I’m an Aussie woman and here the c word is used both as an offensive slur and also as a term of endearment like mate for example. But in America it is deemed as really offensive and basically the worst thing one could say to a woman. Help me understand? Why is the slur so much worse in American culture?
Why is the C word considered move offensive in American culture than Australian?
Post Opinion