why do anti-humectants list humectants as main ingredients? confused!

I am trying to figure out what products to use and when on my 3A/3B hair to reduce frizz and shrinkage in humidity.  Most of the recommended anti-humectant styling products list water and humectants as the main ingredients which all the articles on hair types and humidity tell me to stay away from.  This is confusing to me.  Can someone explain?  

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