Earlier quoted context omitted.
The moral principle in this case is that we don't think jail (or worse) should happen without being proven guilty. That does not mean we collectively believe all consequence requires proof of being guilty. Morals and punishment are not binary systems.
There's a point where this kind of ostracism becomes worse than jail. For many Twitch users, streaming is a substantial part of their social environment or even their full-time job. If I had to choose between a couple weeks in jail and a lifetime ban from working in my industry, or a couple weeks in jail and being banned from all my friend group chats, I'd take jail in a heartbeat.
Further, Twitch is not the entire industry, the same way that Microsoft is not the industry.