Whoa, just look at that flowchart! That’s way too many steps!
Why, yes. Yes, it very likely is.
Few self-published authors can afford all of these editorial production steps. Few would want to even if they could.
But the truth is that this does mirror the traditional editorial and revision process.
If a publishing company that’s banking its profits on producing quality books goes through all of these steps, a self-publisher with a personal stake in their product should make a pretty good effort to replicate that process.