Do you think support articles is one of the best methods for SEO?

Obviously apart from building backlinks from outside your site, but for strengthening your inner pages, do you think it's a good idea to actually work backwards?

I'll give an example.

You have a post about the health benefits of bananas. You have it ranking reasonably well – say top 30.

You then create a support article for this, with another article on the symptoms of being deficient in potassium which explains the symptoms, along with ways to up potassium intake. This mentions foods,…

Do you think support articles is one of the best methods for SEO?