No. of course not! I think people are misunderstanding what "SEO" is all about in the first place. It is not supposing to be some magical thingy to make your website popular fast by spamming links, stealing content, spinning content or whatnot!
Firstly a Search Engine should help people find the content they require, thus the crawlers need to "act" like humans. It is the job of the search engines to filter out low quality content and instead give people the high quality content, which would help them the most. Therefor the content must be unique, well written and comprehendible. If you are searching for a specific article, then you want to be able to read it, don't you?
Now SEO comes in place in order to make the work of the crawlers less painful. You basically "guide" them through your website and tell them exactly what each specific element represents. That is basically all there is to SEO. Especially Google loves organic growth. I won't be explaining an awful lot to organic growth, as you can read some articles concerning that topic on other websites as well, which have covered the subject thoroughly.
On the side there are some websites who have never done anything concerning SEO and have nevertheless a high rating as well as are receiving significant traffic due to their quality content.
So if you want to get a good rating on the web, then work on the quality of your content.