I actually wish that was a YC application question. More specifically: How would you respond when people say your idea is an add-on/feature not a product? I

I actually wish that was a YC application question. More specifically: How would you respond when people say your idea is an add-on/feature not a product? I am not going to actually answer here, because I do not want to become defensive in response to someone being so insightful. The most important thing is now I know it is a potential PG and Co. may have the same "feel".