There are no shortcuts that will make a side hustle into an income overnight because the path is different for everybody. It takes experimentation to figure out how you’re going to take what you like doing and turn it into your primary income source.
Fundamentally, I agree. Particularly when it comes to writing or anything that requires building a social media following. I built one social media account out to about 35,000 followers - but it was a three-year effort. And even then, it didn't necessarily translate to riches.
That said, I think a dual strategy can yield fruit in a shorter period of time. I love the idea of coupling writing along with consulting. You can write every week and slowly build up your portfolio of content and your social following. But your writing can also serve as a springboard to attract 1:1 clients.