Leaving pure estrogen behind? That sounds extremely unlikely.
Think of it this way: If you get estrogen from a doctor what you will get is pills or capsules, most likely capsules. Even those capsules will not contain pure estrogen, but usually have some sort of filler.
So while the concentration of estrogen might be higher in processed soy (or rather, after some ways of processing soy, which is not quite the same thing), anyone trying to sell the idea that what is left after processing soy will be pure estrogen is likely to have other primary concerns than truth.
Sorry to be a party pooper.