'Git' is a common insult in British English (being short for 'whore's get', i.e. an illegitimate child born to a prostitute). This may possibly reflect some private humor on Linus Torvald's part, since Git is putatively the 'son of a Bit[ch]keeper'. The term is used to indicate someone foolish and obnoxious. A non programmer unfamiliar with version control would hear something like 'AssholeBook'.
It might behoove you to hide git in the background, as I suspect they do here: https://draftin.com/about
It's a shame, because I can anecdotally think of one or two occasions where decent version control would have really, really, really helped in managing publications.
I don't think many people are particularly attached to Word, it is just the most common thing that does what they expect. But similarly, tools would probably need at least some WYSIWYG-features. Like a simplified Word, with more sensible back-end formats and the ability to do diffs and merges also in this mode (similar to the change-tracking features in Word). If it is professionally published, complex layouting is done in different tools like Adobe InDesign anyways, so it doesn't need to be able to do much in the way of that.