I like watching some roguelikes or roguelites but I dont enjoy PLAYING those genres. I like to play a lot of games that involve thinking, problem solving, and creativity but sometimes I just want to turn off my brain and also see how other people approach games.

You also received downvotes because your question comes off as a bit crappy. If it were just a question you would have asked “why do people watch people play games?” But instead by singling out adults it comes off as an attack like playing or watching games is and immature activity which it is not. Whether or not that was your intention it will be viewed as such