I see what you're getting at, but these are two different things. The vast majority of humanity as a whole is just not capable of sitting down and chewing through a deep learning textbook or anything of the sort.
What you're ignoring is just how accessible streaming is as an income method. Up until recently, all you needed was the equipment (< $2000-3000 - sometimes paid for by sponsors, often equipment that people already have in modern times) and to be half-way charismatic in order to get into it.
Add in the promise of big money and 'superstars' and now every kid wants to ~be in a band~ be a streamer.
They can claim ad revenue, but they can't take donations or (I hope) subscriptions.
There's a streamer (iateyourpie) who makes a living from mostly playing Mario games, and usually not even being a speedrun WR-holder, just being an entertaining person who markets himself well.
It seems you are conflating Twitch streaming with e-sports, they are two very different things. Becoming a successful Twitch streamer doesn't necessarily require extraordinary skills in terms of playing a given game; switching to a new game wouldn't be that big of a deal and some streamers switch regularly on a weekly or daily basis (e.g. my favourite streamer, who is a full-time Twitch streamer and has 175k followers, plays more or less regularly at least 5-6 different games).
I agree with you on the "big brother" part, but then again this is a characteristic of any career path that can potentially lead to notoriety (acting, pro sports, etc).
1] Likes watching game A.
2] Likes watching streamer K
The first group choose the game, and then the streamer who is online and most enjoyable to watch playing it. The second choose the streamer and will watch whatever they're doing.
Arguably the advantage that the variety streamers have is that pro games don't eat into their viewers. I'll watch arteezy play dota whilst cookin or something, but only if there's no proper matches on with teams I like. I suspect that SingSing will always have a few thousand viewers because his followers are passionate about watching him.
No one hires people to do deep learning with 0 years experience.
Very few people with the skills you assume by default (basically anyone with programming skills) would be convinced to leave their cooshy jobs, but plenty of people with no skills or prospects would.