Twitch is an American video live streaming service that focuses on video game live streaming, including broadcasts of esports competitions. In addition, it offers music broadcasts, creative content, and more "in real life" streams.
Twitch used to be Justin.tv which was much like the category “Just Chatting” where people streamed anything they wanted. As Twitch has evolved they realized that people want to stream their real life activities, so a category “In Real Life” (IRL) was created for them.
If I'm not mistaken, Just Chatting is a category since 2016. Why does it bother you now?
What can you see? Live Streams. Don't wanna see Girl's talking? Don't click it. Easy as that.