"This is one of many reasons why esports cannot currently be taken as seriously as professional sports."
That's where you took it to "HAHAHA you're fucking stoned" territory.
In real sports this happens all the time. There are lots of reasons why esports "cannot currently be taken as seriously as professional sports." But that isn't one of them.
"In esports, you become famous and are basically set up for life as a Twitch streamer"
In regular sports too. They'll first get insulted a fuck ton by everyone, and then, years later, people start changing their minds. If a really famous football player fixed a match and gets banned from every football league and if they then started to stream on twitch. I can almost guarantee they'll get 50k viewers+, depending on how famous the footballer was obviously. But all those those 50k viewers will probably insult him. But as time goes on he'll keep the core viewers and those will support him.
+they too will be "set up for life as a Twitch streamer", if they wanted.
"In professional sports, you get banned for life and get sent to prison for matchfixing. "
Punishments vary from country to country, obviously. And are often, like in CS, given by the league that it happened in.