To be frank, after reading your blog post, while I am interested in the topic you're writing on, there's no way I'm putting down a pre-order.
If you can't finish a partial manuscript when you have people reaching out to you and reviewers ready to provide feedback, how confident can I be that you'll actually write when you have a faceless pre-order instead? Or will life just get in the way again?
To me it sounds like working with a publisher squeezed every drop of fun from the project for the author and freeing up the project could re-inject some personal excitement, motivation and intention again.
It was a surprisingly honest blog post, but like you, I can't really see any reasons why self-publishing would work this time.