Step back, for a second, from your own preferences. Imagine that you are the editor of a new core rulebook. The author has put all sorts of great and obscure stuff in there, but it's 11 pages over the budget for the book.
You come across a couple of tables on costs per parsec for passengers and freight for hop drives. They're each ten rows plus header and title, and some explanatory text in paragraph form, so between them they take about two thirds of a page, even without art.
"Table 16.1 and 16.2 on page 236," you say. "Are they vital? Will a lot of people use them? I don't see much about hop drives in the rest of the book."
"Not really," is the reply. "They'll only apply to people that run very specific alternate universe games, or who run through Singularity and then decide to keep playing in that setting after the adventure, instead of using any other published material for the game, because like the author says, it changes everything and the premises for a lot of published adventures and settings break. So a handful of people."
You know that if you are that editor, out they go.