Lol, those products don't work for most people. Or at least not well.
In my opinion the problem isn't peoples' inability to do mixed hair. It's curly hair period. Some people are so dumbfounded by the sentiment "I want to work with my curls, not straighten them". Do you live in a primarily white neighborhood? A lot of white people don't know what to do with their curly/wavy hair, so they flat iron it.
No one ever knew what to do with my hair. I don't blame them: Dad was balding, my grandmother's hair was thin and short, my godmother was and still is relaxed. So it was always in braids or ponies. Anytime it grew longer than my shoulders, it would get cut. "Too thick and nappy to be long". I won't bore you with the rest of this story. But what I'm trying to say is that knowing how to work with your hair is very practical. And fun!
Anyway, this is why coming to NC was a great idea! There's a wealth of information here that will help you take care of your own hair.