The premise is that you should aim for a higher conversion number because it forces you to focus on a more narrow audience segment. I think that's really sound

The premise is that you should aim for a higher conversion number because it forces you to focus on a more narrow audience segment. I think that's really sound advice, and might go as far as to say that's the key to building any business. Typically any business can find 1 person who loves their product, but then extrapolate incorrectly or slice the wrong segment to focus on. Higher conversion number means you've started to focus on the right segment.