I find the example here highly amusing because I think that while you have taken this quirk to an extreme I do a more moderate version of this balancing using the same feature of the same program. I don't have to have playlists line up exactly but I do keep things in balance. I find that I have a natural bias towards listening to the same tunes too much, with the result being that I don't do enough exploration and overplay the songs I like the most. A rule like this counteracts this bias, so this could also be an example of not letting the perfect become the enemy of the good.