Are you sure you totally disagree? The author seems to mostly agree with your first point -- don't spend too much effort or complexity on scalability until you actually need to scale:

If we focus on scale too early, we sacrifice a lot of the agility that we need early on. We need to think about our growth as getting more cargo on our journey. With each new customer we get a bit more valuable. We also get heavier and less agile. Our job as engineers is to patch the holes in the hull as we find them, and scale the size of the infrastructure at the right times.