It does matter, because determinism generally (but not always) depends on causation. People making (determined) predictions would still influence the (determine

It does matter, because determinism generally (but not always) depends on causation. People making (determined) predictions would still influence the (determined) future actions of other people. Punishing people who acted in a (determined) way would still affect the (determined) actions of other people. Lived experience allows for the possibility of a number of different ontological theories, which is a large part of why there are so many different and conflicting ones.