Well, I'm going to have to agree to disagree with you. There are some obvious things about SEO, but little about SEO is old and outdated. I can think of a lot of confusion about the significance of PageRank - where Google is sending mixed signals. On one hand they're saying it doesn't matter anymore and on the other, they just updated their tables.
Let's see "brushing your teeth" = 355,000 results
"how to iron" = 8,600,000 results
"tie a knot" = 1,960,000 results
"SEO" = 214,000,000 results
And I could be mistaken, but I'm not seeing entire forums dedicated to "brushing your teeth"
I wish it was as easy as just creating content for websites and humans, but the stakes are too high when it comes to generating a revenue base online, or branding your name.