Wait a min. Are we still talking about extractions? Or just leaving behind water. Sure, making a higher proof could be beneficial. Let’s say you could control temp within +\- 10Deg F. So you boil the ethanol and are making a higher proof. Does that mean your water/THC/cbd and other oils mixture doesn’t get dried properly?
I think we have gone off on a tangent here. You won’t be making a higher proof anything if you are still drying your THC/cbd and other oils mix into a smokable product.