Why is starch insoluble in ethanol?

I understand that starch will precipitate from an aqueous solution in the presence of alcohol. I also understand that molar mass effects solubility and starch has a relatively high molar mass. There is also an issue regarding the polarity of the solute and solvent.

Is the insolubility of starch (which has the form $\ce{(C6H10O5)$_n$}$) in ethanol only due to the fact that starch is polar and ethanol is only slightly polar?