I'm writing a little more about that because it's sad to read an article like that that makes no sense.

SEO doesn't exist because the ONLY way to optimize your website is to write good content and get quality backlinks. To be precise, 99% of "SEO" is backlinks and 1% is your HTML quality (in-page SEO).

To give you an example, you can have the worst HTML, no internal linking, to Sitemap, no nothing, but have 10-20 quality backlinks and still be #1 in Google.

I'm doing internet marketing for more than 15 years now and the proof is out there. Quoting something else from the article:

"Google will try to follow relative paths inside of Javascript, even when they don't exist. This can result in polluted crawl error reports."

So he author claims that a relative path to a URL (inside a JS call) will effect your organic results. I wonder if anyone understands that this makes no sense and especially SEO-wise.