I require two thumbsticks in VR for many applications. Of course one does not need only own one set of controllers, might as well have different ones for different purposes.
Personally, since I use an Oculus Rift at home, I’ve never felt the loss of a trackpad, even when playing Steam VR games. I’m not saying it’s a bad idea to have the “one of each” option, just that we don’t “need” at least one trackpad.