Factors of choosing an authoring tool. What you see is what you get. WYSIWYG.

So, if you use 3 columns of text you have the opportunity to design left-right pages so graphics can be centered or be offset towards the spine or towards the outer edges.

When starting a chapter I try to use the left page as a full page photo, the chapter title and half page of text are on the right side and that is page 1 of the chapter. Afterwards each facing page spread has a left-right character.

I want my editor tool to show this. I want the text to flow around the photos and images.

I have a thing about “creating”. I do not just write long pieces of text. I want pictures, graphics, artwork, maps, diagrams, tables, and more. It must produce a PDF. I want to see what the PDF looks like in near real time. I do not want to hire a layout person for $000’s to create the final product for me.
That would be like a blind man hiring a sculptor. I am doing sculpting, not authoring.