I think I understand why you're not convinced a way to share pref settings (as a whole) with others is necessary - If users change pref settings without understanding, that can cause confusion and additional work.
After all, Dopus' target audience seem to be mostly power users. And it makes sense anyway to get into the workings of Dopus to get the most out of it.
However, as MegMac has explained, Dopus can also be used as a specialized software such as video/photo organizing. In this case, the users might not have a reason to learn about Dopus in depth.
I think I've also read a comment somewhere else about someone installing and configuring it for their parents or someone with less than average PC knowledge, but couldn't find it again...
My own use case for wanting to share a prefs settings file would be sharing prefs that make Dopus as similar to Windows Explorer as possible for people that liked Windows Explorer, but aren't necessarily power users or IT specialists. People that liked Windows Explorer in previous Windows versions or thought it was always just "good enough" - until a breaking point (like Windows 11).
I was actually one of those people - I always knew that 3rd party file managers existed and were much more powerful, but I didn't feel like learning a new program for what I thought was "just file management" and I also didn't know how customizable the Dopus UI is.
If someone had shown me a file manager that looked exactly like the Windows Explorer I liked, and told me I could switch between single/dual panes with a single click and add user-created buttons and scripts for virtually anything, I would've gotten into Dopus much earlier.
Regarding particular prefs I'd want to share: I've made several changes in my prefs already, but couldn't find those again. I think one was Full-Row Selection and one was mouseover highlighting of rows.
So there's also the related thing that Dopus prefs settings seem to be complicated and difficult to find. (Partially the downside of Dopus' great customizability ofc.) There's no search option in the prefs dialog and it always takes me a while to find a setting when searching the help and the forums, even if I've already found this setting before.
A shareable file that changes pref settings as defined when executed could help with that. It could display a table for the contained prefs with the columns "Factory Setting", "Current Setting", and "Setting from Shared pref settings file", so that the user understands what's actually changed.
I can't say whether these are worth the effort of developing a feature for that or not.
For me, the #1 features I'm going to request (when I've gotten a bit deeper into Dopus) are some ribbon-style related features. These would be things that aren't possible at all now. In comparison, a shareable prefs settings file would be nice to have, but is something that can be worked around as well.