I'm not an SEO, but this looks like a load of crock to me.
"no seo is the best seo" -- Utter garbage. Google is a computer running an algorithm.
If no seo was the best then that means that everyone with their own blog and home-written good useful content is going to rank, but they can't all rank.
The only way "no seo is the best seo" will be true is when Google hire a trillion workers to manually review all sites or we get AI able to match minimum wage workers and assess quality independent of factors like backlinks/keywords etc.
As long as there is an ALGORITHM, then there will be the ability to increase your rankings through manipulation.
Besides, do you guys really think an ex employee would be allowed to disclose any information Google didn't want out there? You don't think the search time sign an NDA?
Google would legally crush anyone who tried to share any real information about the algorithm. From a career perspective it would also be suicide. No big company wants someone who'll divulge company secrets on a blog.
In my opinion Google are doing this as part of a campaign to convince people that the days of SEO are over and they should focus on quality. It's misdirection.
The more people they can convince that "no seo is the best seo" the easier it'll be for them. If no one SEO'd then the search results would actually be amazing and highly relevant. Ie, if all backlinks etc were natural. Backlinks in theory are a near perfect form of determining the quality of a site, the problem is they can be manipulated.