The author ignores acquisition cost, and it's not about advertising or anything. It is as in, if you're able to find 1000 fans on a millionth likelihood rate, you would need to have 1 billion people to evaluate your music/game for long enough to have an opinion on it, and that is not going to happen.
And that's what's wrong with the thinking 'I can have really niche product there will be someone liking it on this planet'. It doesn't work that way, In order for those niche to be found you either have to force every single person to evaluate your stuff or if those niche are naturally concentrated (possible). But if the potential suscribers are 1000 uniformly distributed in the world then we should just scrap it.
And that's what's wrong with the thinking 'I can have really niche product there will be someone liking it on this planet'. It doesn't work that way, In order for those niche to be found you either have to force every single person to evaluate your stuff or if those niche are naturally concentrated (possible). But if the potential suscribers are 1000 uniformly distributed in the world then we should just scrap it.