Someone below mentioned that dry ice would be needed to freeze the ethanol but you didn’t say you wanted to freeze it. That is partly why I was confused since freezing would damage compounds. Keeping it cold would not
Typically for herbal extractions I want everything from the plant. Herbalism basically says that the mixture works better than any individual compound. If you want to a more focused effect you take multiple plants with similar effects so you want to grab everything.
I have a friend who saved his sticks and stems from his homegrown cannabis plant. I will definitely try this if I want to try to extract from that. I bet that has much more undesirables than something like basis which is edible from root up.