Well, it's not that easy. This reminds me of this article about Patreon - where it claimed few people made - even the minimum wage from it! O.K., why is that the case?
Well, the reason is the fact that online endeavors - like any business - generally require a huge investment in marketing - but that wasn't mentioned on the article! Anyway, though, as you say - if someone can make it with streaming etc.. - then power to them!
O.K., well I am assuming the worst - cause I really believe you'd have to own your own traffic stream, website and/or social media page - at the least - and it would have to be big and full of targeted traffic.