I both understand the surprise - after all, I used to spend a lot more than two hours a month on this myself! - and consider it a lot of time for what I consider to be a very low value activity.

Reading and commenting on HN is also fairly low-value activity, but I certainly learn useful things more often than I do when futzing around with my OS, and that's just bonus; it's mostly an entertainment activity. Playing with my Linux configuration used to be an entertainment activity for me as well, but once that stopped being the case, it stopped being a good use of my time.