Step 1: sell 10k copies of your book through self-publishing.

Step 0: already be successful at marketing or be well-known.

There are certainly some valid points, but his solution pre-supposes that you already know your marketing.

So the actual steps would be:

* consistently produce good content for several years, build an audience (and an email list, as quaint as it sounds)

* write a book, self-publish it

* promote the out of it

* THEN try to get a publisher on board