theducks, I understand the philosophy of what you're saying even if I don't understand the practical application of it. When arfellian mentioned using the same "kit," I assumed (always a risk) that meant Word was a part of it.
Be that as it may, I would love to have your knowledge and skill at dealing with the source code and not have to rely on what some other application does in flawed attempts trying to create it. But first and foremost, I'm a writer whose core interest is in creating stories. Without the financial ability to hire others to create the products, I've had to teach myself how to do the best job I can with what I can reasonably learn without detracting too much from the writing.
The various forums for Word, Photoshop, InDesign, Sigil, and Calibre have proven to be difference between success and failure at this writer's desk. I shudder to think what it would have been like to try this without such user-friendly access to experts who are willing to share their knowledge.