I'm pretty sure Paul is right. In a production environment, aligning a triangle driver to a triangular hole simply takes too long, and time is money. Even if the screws and drivers were free (which they're certainly not), it would add to production costs on the time factor alone. As for the lobes of the Torx driver shearing off, not within the torque specifications of the fastener. If you exceed those specs, the fastener will fail no matter what system is used.
I don't believe in safe queens, only in pre-need replacements.