The notion is highly misguided. What actually hides being it is: unless everyone cares about it, then no one cares. What if only one in a thousand people care

The notion is highly misguided. What actually hides being it is: unless everyone cares about it, then no one cares. What if only one in a thousand people care? That's a huge number. You could have 10k or 100k readers. It's a minuscule number compared to everyone, but it's a huge number for a blog.