The current barrier to entry for making money online by telling stories is you having the resources to read this text.
I think that's missing some important aspects. We have reached total absurdity in how "content creators" compete for our attention. That means a few thing if you want to make money online by telling stories, at least enough for a decent living.
First, you cannot do that without dedicating significant time to it, and I mean more than a healthy amount of time to dedicate to earning an income. It's all or nothing with your time.
Second, you have to be some kind of psychopath, convinced that you are justified in competing extremely for people's attention. It's not about doing something cool and giving/selling it to people who appreciate it. It's about pushing buttons in brains to keep people quickly rewarded and addicted.
Third, you need some leverage against established content creators, because you're aiming to steal attention from established audience. Most likely this boils down to a lot of luck.
I'm sure there's some counterexamples to the first two points, and I expect they're outliers and/or early established.
I think your statement is a bit like saying that anyone can make music with current tools. It's true from a certain perspective, but success is explained by factors that are ignored by that perspective.