I crush and strain because I don't use foundation. I don't use it for many reasons:why crush and strain? the comb is more value to the bees it takes so much sugar/honey for them to make use a extractor and let the girls keep thier wax.
I don't know which book I have that states it (and I am too lazy to go look it up right now), but one of them claims 8lb honey for 1 lb of wax. As I remember they set up some hives on drawn comb and and some without drawn comb in a yard. At the end of the year they weighed the wax (from the hives without drawn comb) and honey from both.The notion that it takes a tremendous amount of sugar (I.E. 10lbs of honey to make 1lb of wax) is absurd.