My experience with low-barrier-to-entry fields like writing is, to make it to the top (which is what you want to do), you almost certainly have to do better, and have more specialized knowledge than, common-sense truisms like: work hard, be a good explainer, that sort of thing.
That's all low-barrier-to-entry knowledge. I'm not going to get much traction on Google with a tutorial like, "hello world" in Python. You have to improve on this low-value stuff to climb the ranks - which is what a book like this can offer.
I would respectfully say the advice you're offering here is a little too unfocused and low-yield, in the age of SEO.
Example: I'm a busy guy. I've written tutorials before, and it's pretty dispiriting to spend, say, 6+ hours writing something substantial (a realistic outlay for an article), only to see it wither away at the bottom of the Google rankings.
Similar example: build a no-name e-commerce store, watch it do nothing except cost you money.
So, you start to search for experts who know what they're doing - say, for e-commerce, SEO. They're not scam artists: they encourage you to write real, valuable content, and the good ones produce that themselves.
But they also say, you have to be more strategic than just like, low prices, placed next to paint-by-numbers articles. You have to search out keywords or areas that haven't been filled yet, and filled those.
And they often know counterintuitive things, that come from hard-won experience.
Example: for e-commerce, they say, you actually shouldn't just throw something up on the blog every week (a reasonable interpretation of the 'write often' advice). Instead, research a good area, then write a high-quality article, that you really invest in, over the course of several weeks. One such article can be worth 100+ low-quality articles which are basically just 'putting this up there to meet my quota for the week'. Internet traffic isn't linear - so it pays to have a strategy that acknowledges this, and builds off it.
That's one reason why I'm thinking of buying this book, since I think the non-obvious stuff is worth more than people commonly assume.