If the drop-shipper cannot deliver in time, customers will get impatient and continue to give you negative feedback and future customers won't want consumer from you will.
People seem to learn things better when they actually take action. https://insitelandgroup.com/__media__/js/netsoltrademark.php?d=Groups.google.com%2Fg%2Fbest-dropshipping-apps-for-shopify%2Fc%2FrV7voMHWFCg