The article is saying that Google is not the only search engine on the planet and that the SEO guide does not promote SEO. I do not see how this information should be kept hidden?
RE: Matt Cutts Video from 2009
At the end of the article they also say that it is possible that they could use this information again. They totally left it open. Why, because they know they are useful and they were not committed enough to give a straight answer.
Quote”Q: Does this mean that Google will always ignore the keywords meta tag? A: It's possible that Google could use this information in the future, but it's unlikely. Google has ignored the keywords meta tag for years and currently we see no need to change that policy.”
My question is.. why are search enignes reading the tag if they are not using it?Just in case??
Google had to say that they were not using kw tags because people were stuffing keywords in to fool the search engines and it was working! This made the search engines look useless.
I personally do not listen to what others say and judge my SEO on total results. For many years we have been told to do this and don't do that and it become confusing to say the least. Google has not even finished perfecting their algorithms so how can we discount any small process?
That is totally fine if you do not agree about the tags being important today. The answer is easy, don't use them.