"As a founder your sole aim is growth. If you don’t have growth now, you are failing."
That's only half-true.
To simplify a bit, there are two types of startups in the world: Twitter, and the hoverboard.
Twitter is easy to build, but the question is: does somebody actually want it? Twitter startups are all about market risk.
Conversely, if you could build a hoverboard, then of course people would buy it. Hoverboards are awesome. The question is, can you actually build it? Hoverboard startups are all about technical risk.
The advice to focus on nothing but growth applies to startups where market risk is the dominant risk. You need to validate that there's actual demand for your product. And that's where advice like "If you don’t have scale, you probably don’t need (much) technology", "try no-tech," "[edit] static content and embedding some forms" applies.
But if you're building Tesla, or a cure for cancer, or self-driving cars, or most enterprise products, or any number of startups which require a technical breakthrough, you literally cannot focus on growth from the start. The minimum viable product for these types of areas may take months or even years to build. The experiments you should run for those types of startups should validate technical assumptions: for example, can we make a battery energy-dense enough to power an electric car? Or they should validate market demand through customer development, which is actually quite useful in many areas such as enterprise sales where achieving growth may take 6-18 months even in the best case.
In general, when you hear startup advice, it's wise to remember whether the author's startup comes from the world of technical risk or market risk. The right things to do for each type of startup are often complete opposites, and it's easy to get confused since most people give advice based on what worked for them, but don't necessarily include the context which circumscribes where the advice applies.
As always, Steve Blank said it first and better: http://steveblank.com/2009/05/28/vertical-markets-2-customer...