I lean toward “efficient entertainment”, but I do sometimes wonder what that chunk of my free time would look like otherwise.
It’s funny you mention that circumstance, I finally got around to finishing all three endings and S-ranking most missions of Armored Core 6 while I was recovering from rolling my ankle slipping on a ledge while hiking.
More to the point of the post, I also spent a good bit of time researching the ecology of my local lakes and rivers for summertime for when I estimated my ankle would heal and once I was better I was equipped to get back out on the water.