It's interesting if you consider the time spent writing versus time spent reading. This post will take me less than a minute to write, you less than a minute to read, but perhaps five/ten people will read it - a 1:10 ratio.

Popular content will have a much larger ratio - if I am a popular writer I might spend a day or two on a fancy blog post like described above, but if 60,000 people spend 10 minutes reading it that's 600,000 minutes - 10,000 hours! Now spending a bit more time to make it more useful/enjoyable/readable seems worth it.