The tablets are our only reliable communication between one another at the moment, breaking one could prove more dangerous than the information is worth. What would happen if you needed help or got hurt, you wouldn't be able to call anyone.

[He sounds half sternly lecturing and half eagerly explaining, because he does understand the lure of information.]

We might be able to break one open in the future if we find another way of communicating, or if we get a safe base camp established, but I don't think it's worth risking anyone's safety for the possibility just yet.