One other thing I wanted to add — check the names of the Force powers in question.
Why would you “Bind” something? Would you “bind” a rock? Probably not.
IMO, the purpose of Bind is to stop a sentient being, or something otherwise moving under its own power, from being able to perform some sort of action — Stop a person from firing a blaster, or stop a droid from accessing a computer system, etc….
That might require moving them away from some position or location, but the movement wouldn’t necessarily be the purpose of the action, it would just be a side-effect of preventing from them being able to do whatever it was they were trying to do.
I think this is the primary reason why Bind doesn’t talk about being used on objects (IIRC), whereas Move does — an object by itself doesn’t do anything that would require you to “bind” it in order to stop it from doing something.
Now, you could argue that a grenade would certainly be an object that you might want to stop from exploding, but could Bind be used to contain the explosion? I would seriously doubt that. OTOH, I wouldn’t necessarily complete rule it out, if the player in question was able to convince me.
Anyway, just wanted to add that thought to the conversation.