This entire pursuit of disruption has become just a red flag to me. Are there industries that are desperate for an outside company to come along and change the status quo? Absolutely. However, the SV "disruptors" have soured my view altogether on their willing to just be a bull in the china shop looking to gain notice/investment, yet ultimately not actually providing a good service/product/etc.

Isn’t the controller area network an equivalent standard for interop? What’s keeping someone from offering a physical button that signals toggleLatch to the device providing glovebox services on the CAN bus?

While CAN is a standard, it's basically transport layer only. The automakers have all sorts of custom stuff on top of it that's wildly proprietary. Talk to a mechanic and they'll complain about how each car company requires them to buy their own special software suite for diagnosing issues.