You are not just watching someone playing a game. Streamers add commentary, role play, humor, and communicate with audience. Kind of like Mystery Science Theater 3000 but with video games mixed and social media. They mix in their personal lives/drama and the audience becomes emotionally invested. I find the whole thing fascinating. Old people think it's stupid but these guys have audiences in the millions and make a good money. My kids pretty much never watch any tv shows or really anything on normal tv. It's all youtube.