I fund a few YouTubers on patreon, because they create content in the traditional sense, e.g., research, writing, filming, editing, etc. That's hard work.
Streamers don't do any of that; they literally sit in their basement and play video games all day. Why do they need support?
Sure, watching a stream is entertaining, but when I think "supporting a content creator", I have to imagine that my support enables their creativity in some way. Does a streamer with more support produce better content than a streamer with less support?
The only thing I can think of is more support might allow a streamer to devote more of their time to streaming.