for anyone who has been in Startup School and successfully gone through it, would you say it's best to have a Startup that is a "product" instead of say a servi

for anyone who has been in Startup School and successfully gone through it, would you say it's best to have a Startup that is a "product" instead of say a service-type business? For example, I am working on a side-hustle that is more of a service that sells a product, versus a traditional app/SaaS app. So I'm wondering if Startup School is more geared towards product/app businesses than a typical service-type business.