Field Service - Turn of Product Inventory Qty Check

In the Field Service App -> Settings -> Inventory, there is a setting to prompt inventory dialog to confirm or reject, but there is no option to turn the check off entirely. Some of our clients don't use the Product Inventory feature, but do want to mark stuff as used, causing the system to always flag product as negative inventory. While users can constantly hit okay all the time. We should have an option to just turn it off entirely.