Actually, I'm not sure if this is true. I recently watched a lecture (that I can't find right now) on something like "How to write a good math paper". In it, the speaker made what I thought was a wonderful observation:

Often, he sees new graduate students reviewing paper submissions to conferences or journals. These students are usually very critical, and their criticism is usually dead on-- the things they complain about are genuine defects of the papers. However, when those same students write papers they do not live up to the standards that they have set!

So, the problem may be more of what Ira Glass hints at-- people who have good taste, but are unable to apply that taste fairly to their own work.