I agree, but this blogpost is NOT about professional trajectory. It's about sales and GTM success criteria for startups

That’s the danger of the mediocre success. The point of startup experimentation isn't the success itself; it’s the learning that comes with clear-cut success or failure. You don't really care about the sales revenue generated by your first two reps; you care about whether this is a strategy you can scale to dozens and then hundreds of reps, or whether you need to use a completely different strategy. It’s all about the learning. And mediocre successes don’t give you any learning.