As I understand it, the principle shenanigans going on with commercial flour is that they add enzymes (if you're doing this at home, it will be malt) to the flo

As I understand it, the principle shenanigans going on with commercial flour is that they add enzymes (if you're doing this at home, it will be malt) to the flour before you take it home. Unless I'm quite mistaken -- please tell me if I am -- the whole point of a slow/retarded proof is to give the enzymes a chance to break the starch down into component sugars. When more sugars are broken out, you get both a nicer taste (it's sweet!) and a more beautiful crust (the sugars caramelize/brown). But with home-milled flour, are there no enzymes at all? What happens to the slow-proofed dough?