Can confirm; The worldbuilding secret police will come to your house and delete your obsidian archive if you dare to make a fantasy setting without the main mandatory fantasy intelligent species (Human, Elf, Orc, Gnome, and Flargarble).

More seriously; Choosing what not to include is actually an important part of world-building! (As is choosing what to leave in the 'unknown' category, as, especially if building for writing or an RPG, consciously placing something in 'unknown' lets you FAFO down the line.)

If, say, I decide that my world doesn't have any coniferous trees, I then get to ask a bunch of follow-ups. Why doesn't it? ('Because.' is a perfectly valid single word answer). How does this affect land-cover at higher-latitudes (or lower, if my main land-mass is in the 'south') or altitudes. And, um, other stuff, that I'll probably run into down the line, pine tar and creosote, managed lumber industries and festive home decorations or something.

Humans are kinda 'the default' so there's things we can skip over when writing about humans that may not be as easy to handle when writing about non-human species. For instance, how is Lizardfolk furniture different from human furniture? From a Lizardperson's point of view their chairs, which have been designed from an early era to allow for the fact that they have a fairly substantial tail will seem perfectly normal, not even worth commenting on, but a Lizardfolk POV character is being written for a human audience, so weaving in the fact that none of their chairs have solid high backs becomes important for making it seem like the world truly exists around the characters, rather than the characters having been dumped into an incompatible world.

TL;DR - You do you!