prpgrams basically use it for authentication, it has other uses too, but is effectively a tool to verify if the computer is the correct person, as no other device would be capable of immitating and create the message they sent. because of that, its effectively a hardware ID, attached to the tpm module, or more commonly for consumers, the CPU.
banning said device would effectively be a hardware ban. which would be used by compeotitive online games to dissuade cheaters an evergrowing problem with lack of solutions.