Because pointlessly sitting around on my couch is nicer than pointlessly sitting around in some loud venue or outside with god awful weather.

I blame Covid personally. Before Covid there was stuff going on that could motivate me to go do stuff, but not so much the last years or two. Even going out to bars feels tedious now.

Its not me and I'm not sitting in doors but there are people who are so alone that no one would notice their absence. Actually quite a large problem in certain parts of Asia.