What if we were born without the need to consume or generate matter? I think it's easy to generate idealistic scenarios, but not so easy to implement them in reality. There's a couple counter-pressures to your question. The first being that the average consumer has come to expect and demand a higher level of functionality out of even simple devices. The next is that there's no monetary incentive in creating the perfect system from the start, especially when you can just use premade things. Finally, hackers (whether they be nation-state actors or your neighbor's bored teenager) are CONSTANTLY on the prowl for vulnerabilities in all things connected to the internet. With that in mind, it's not quite as easy to develop the perfect, unhackable system.