I never actually thought about this, but you're right. Wtf isn't this a standard, and part of saftey scores?

For some cars you can remove the head rest and use the metal prongs, but it's still probably not as good as an actual purpose built punch.

Doesn't seem there's a tool available for breaking laminated glass. Which is also terrifying but I do understand why the DOT mandated the switch.

In most cars I would say use the headrest, but my assumption on that the trasla.did something dumb to make those not useful either.