In case anyone else got confused about how lactose-free milk somehow managed to have exactly the same macronutritional profile as ordinary milk, it turns out to

In case anyone else got confused about how lactose-free milk somehow managed to have exactly the same macronutritional profile as ordinary milk, it turns out to be because "lactose-free" really means "we added lactase so the lactose is pre-digested", not "we removed the lactose". The sugar is all still there, just in simpler forms.