Normally I would agree. But there are also very heavy regulations around selling telecoms devices with hard requirements for things like interacting with emerge

Normally I would agree. But there are also very heavy regulations around selling telecoms devices with hard requirements for things like interacting with emergency services, regs that do not apply to general electronics. Similar also applies to medical devices. Its the product in its entirety that gets certified as suitable for sale and warrentied against, for example, repeatedly dialing 911 in a fault condition and getting you shot by a swot team.