As I have said in a previous thread (must give it a 'bump' for arfer mo to have collected his and others thoughts on racking and stabilisers), no real need for chemical additions for dry wines, and no need for them in most sweet wines, given a little sensible consideration for avoidance of further fermentation.
Enzymes are a natural ingredient, so not under the umbrella of chemical additives.
Natural fermentation is a bit of a lottery as the yeast strain which becomes dominant may not be the most desirable. Could be good, but may not... I don't think the risk is worth the cost of any sugar addition, or even the effort of all the preparation. But the choice is there for the head fermenter to make....
Enzymes are a natural ingredient, so not under the umbrella of chemical additives.
Natural fermentation is a bit of a lottery as the yeast strain which becomes dominant may not be the most desirable. Could be good, but may not... I don't think the risk is worth the cost of any sugar addition, or even the effort of all the preparation. But the choice is there for the head fermenter to make....