>>412818190
the game wants your head in your avatar's head, and your hands in your avatar's hands. To do this, it scales the world bigger or smaller until the avatar fits the player. 

Problem: A normal human has an armspan that is about the same as their height. See pic related. A virtual avatar might have different proportions than an normal human. Should it scale the avatar to match armspan or your height?

If it does the former, you might find your real floor higher or lower than the virtual floor, stopping you from being able to pickup items on the ground. If it does the latter, the avatar's arms might fall short when your arms are fully extended or remain bent even when your arms are hanging by your side.

This is why proportionate avatars are important or you must deal with one of these compromises. It matters even more in FBT.