I'll agree with the author of the article that there is a lot of things to do in this world and a lot of things to experience and it is impossible to do them all. But, just because there are some things he considers "more worthy" of time doesn't mean I view them the same way. I am an introverted individual, meaning I am more comfortable alone or in small groups. I have a decent circle of friends, but if I am around all of them at once, I feel a bit uncomfortable. It's just too many people. Five to six at a time though, and it's all good. And we are friends because we share similar interests, which includes gaming of all kinds.
This article seems to only be counting solitary gaming, especially MMO's due to the mention of raiding. However, even that can be social and you can have friends online, even if you've never met them in person. If you're on your deathbed, who wouldn't want to be spending just a little bit more time with their friends, even if it is through a game?
For me personally, I could see having some regret that I didn't finish a game, so I didn't get to see how the story pans out. Same for a book, or a movie or TV series that I may not have seen. Because these are the things I enjoy doing. I also enjoy spending time with my wife and child (second one due in December), playing games with friends, going out to dinner, etc. Just because I don't want to climb a mountain or attend a family reunion (I go to them, but GOD they are boring) doesn't mean I'm wasting my life. It just means I'm spending it on things that matter more to me.