"Just" is doing a lot of work there. Maybe the idea is reasonable, but the setup as-is is not safe, and there's nothing in the article that would tell you that, or tell you what you need to add to it to make it safe. Many people might read the article, think that it's all safe (because they don't have the knowledge required to properly evaluated it), and then burn their houses down.

Not saying this is the most unsafe thing I've ever seen or heard of, but we have electrical codes for a reason... because buildings have burned down and people have died.

It falls into that "soft bigotry of low expectations" zone. There are intro articles and advanced articles; the advanced ones don't need to spend the first 1/3 of the volume talking about safety.

I don't see any gatekeeping, I see safety concerns.