I also write and read a lot. I’ve come to the same conclusion you have. I write all my own content on my sites, and I will hardly ever outsource content on client sites, unless there’s a specific area of expertise I require. (For example, I hire a retired periodontist, become medical writer, for one of my clients with a periodontal practice, just to get all the facts correct.)
You’ll want to capture users’ emails regularly, both when they purchase…and even before they become a customer. You can use lead magnets or discounts to incentivize email sign-ups and using an email management service like MailChimp allows you to create triggered autoresponders that will automatically send out pre-made welcome email campaigns when they subscribe.
Gaining Google's trust doesn't happen overnight. It takes time. Think about building up your relationship with anyone. The longer you know that person, the more likely that trust will solidify. So, the reasoning is, that if Google just met you, it's going to have a hard time trusting you. If you want Google to trust you, you have to get other people that Google already trusts, to vouch for you. This is also known as link-building.
And on the other side of these huge CEO’s, there are guys like Andre Chaperon. Andre has access to all these "million dollar launch club" internet marketing “gurus” and knows the truth behind their numbers. He doesn’t have a budding YouTube channel or any of the typical “have-tos” in internet marketing. His crazy successful internet business is even called Tiny Little Businesses!