>>270896019
Sure, you can make a giant bugmonster with 8 arms and even have them all move when your actual arms move.
Some people do stuff like that. But in terms of the humanoid avatar thing, I mean, they're going to mostly all be humanoid since we're humanoids IRL and so we can't really do stuff like a 4 legged animal in VR [spoiler]unless you're a sick furry fuck that crawls around on their hands & knees all the time or something[/spoiler].

And also because cute anime girls are more appealing than giant bug monsters.