As much as I'm careful about Google keeping my data, I have to recognize that this has helped a friend tremendously. He was separated from his ex, she had left with their daughter, and he was trying to get split custody. She testified he was a deadbeat dad, and she put it in writing that he had never been to pick up their daughter at school, never taken her to her regular weekend club activities, etc.
He reached out to me asking if his location history could help prove she was full of shit. It took me an hour or so to figure out the right way to process the data, but then I was able to give him a detailed list of dates and times he had been to his daughter's school, poney club, etc. His lawyer attached that to their rebuttal. I like to think it made a significant difference. He did get joint custody in the end.
I don't think it's accurate to call the barrier between a streamer and their audience "the fourth wall". The fourth wall is a concept that exists in theater, and then more largely in fiction, where characters exist in a world where they do not know that they're characters in a story. And the fourth wall breaks when they realize that they are.
If "chat" breaks the fourth wall, then self-help books that use "you" are too, or news anchors addressing their viewers, or politicians saying "my fellow countrymen" in a broadcast address.