well, if you prioritize googles information on top of the other stuff, then there won't be an issue, as people would never find enough time to reach the other stuff, as googles information on the topic is very, very extensive.

sadly a lot of people are not very good at prioritising information intake, that is why i stick with my "do not read SEO blogs" recommendation.

the logic behind this is actually quite simple

let's say: x% of everything written in Z is bullshit (incl. deprecated or no longer valid).

let's agree that if Z is "seo blogs" then x is higher compared to the case where Z is "google recommendation", then it is always a better investment to read an item of x if Z is "google recommendation".

i would place the values of x something like this

  if Z is "seo blogs" then x is 80
  if Z is "google recommendation" then x is 20

>and read it with a pinch of salt

if we substitute "with a pinch of salt" with "flamethrower" then yes.