It is a great question! Why does anybody play a specific game? For my kids gaming is a way to form a collective in-group narrative between a set of kids. That means that they all drift to the same games. My sons actually play different games together than the games they play to form a narrative with the bigger group. For me I play solo without talking about it with other adults too much. Many of the games are of the type I played with my friends when I was in the phase my kids are in now. Mostly 4x and RTS/TD. So my relaxation also has a nostalgic element. I don't grok Fortnite, but I do grok the cultural element in a few hundred million (!) people watching the same seasonal change. I wish I could have had gaming as a cultural element on that scale when I was young. Based on my preferences it beats the fads of the 90s by a very long stretch!