Yeah, if you don't need it, you may as well disable it.
When you open it, is it working properly? I just noticed mine was stuck on "Initializing your device" because NFC wasn't turned on.
Maybe your problem is something similar? I don't know. Just throwing stuff out there. It must be happening for some reason...
Although do you even feel it's affecting your battery life? Have you rebooted the tablet at all?