The key word there is ‘explaining’: nobody wanted technobabble, but the characters had to look like they knew what they were doing. The low-level worldbuilding had to be in the background, and it was amped up on TNG where Mike Okuda and Rick Sternbach developed technical memos and a writers’ technical manual that they would then expand upon and publish as Star Trek: The Next Generation Technical Manual (so it was not a passion project by fans). Just because it’s not a medical or a political show doesn’t mean that rules shouldn’t be discernable if you’re looking closely.
Which is all BTS minutia that I, as a viewer, do not
need to have in order to enjoy. If they are presented on screen as knowing what they are doing then I do not care about the size of the ship, or how a tricorder works. It does what it is supposed to do.
That level of world building outside of the show is a bonus, not a requirement, and can be changed. This includes the size of the ship, as that has very little (if any) impact upon enjoyment of the story.
I get that fans want the technical details. As I said upthread I am well aware of Robert Heinlein and his writing of orbital calculations for his stories. But, it is not a
need for fans to have to enjoy the story as long as it is presented well on the show.
If the story is failing to present itself without the aid of ancillary materials that is a failure on the writers in worldbuilding and that's on them. No book is going to fix that issue in a story. And that's why I don't see it as being as important to the fans to have things like the Eaglemoss details, or the tech manuals. It is important for the production team.
This doesn't change the fact that DSC and TOS are still telling the same story with the same tools, just from a different basis of knowledge, 20th century tech knowledge vs. 21 century tech. Since Star Trek is built upon our humanity this update is expected.