Sacrosanct
Legend
But watching streams and playing are not equivalent experiences. At all. The things that are fun and entertaining about a good stream/video/podcast are not the same things that are fun and entertaining about playing the game. Asking the question "why not just play" not only fundamentally misunderstands the entertainment value of actual play, it is dismissive of it (which leads to that whole gatekeeping thing we're talking about).
For me, the biggest difference between watching and playing is active participation. When playing, I have control of my character. I can plan, role-play, have social interactions with the other players, etc. That is the funnest part of the game. It is a social game after all. Watching doesn't do that for me. I'm not saying people can't have fun watching, just expressing my own personal feelings.