Nice photos and description and I do enjoy Moebow's tutorials. But, not every seemingly correct and theoretically sound approach works well for every single shooter. If it did we'd all look and shoot exactly the same...and be Robin Hood in short order. How boring would that be? (no offense to compound shooters) :p
Hand placement is just one component of consistency and consistency is mostly about getting and keeping good alignment between the target, arrow (eye), and drawing elbow. If your bow hand is unnaturally 'crooked' on the grip, or allows horizontal or lateral bow movement before the arrow leaves the shelf, or needs to be adjusted to 'feel right' or to hold the bow weight while you draw to anchor, or feels 'shocky' when you release the string, then it's probably not the right hand placement for that particular bow. A straight unmoving line from target to drawing elbow...simple concept, not-so-simple process, but not rocket science. Tempering science and observation with LOTS of common sense has it's advantages.
Whatever hand-to-bow placement helps you to get and maintain the line is what you are after. It may mean a loose grip, as many have found works best for them. Or it may mean a much firmer grip, as many others have found effective (including me). Pick what works for you by testing various approaches and don't forget to try them out under the circumstances you will normally be shooting (target line, treestand, kneeling, sitting, gloves on or off, bow quiver on or off, etc). An open mind and objective testing works better than a paint-by-someone-else's-numbers approach.
Tweaking your form components is a 'hands on' job that requires a careful process to be sure...but there's no need to make it harder than it is and no need to depend on someone's else's 'right' to find your own.