"A startup is an organization formed to search for a repeatable and scalable business model. The goal of your early business model can be revenue, or profits, or users, or click-throughs – whatever you and your investors have agreed upon. Most startups change their business model multiple times."
I disagree with the idea that a "startup" needs to be "optimizing for growth at all costs" - as you say. I think this is actually a rather dangerous approach because growth at all costs is how we get things like Ponzi schemes, WeWork, and other abusive organizations.
Your comment also seems to imply that you can't do anything meaningful if you don't have/raise money. This is simply not true.