1. I get many security holes patched.
2. I get a hotspot on a phone plan, which is usually cheaper and can be used as a second phone.
Network security is unmaintaniable. Start caring about defensible boundaries instead.
Also, I really do question the premise; it is possible to be selective with what you let on your network. You shouldn't rely on it, of course, but again, better to minimize exposure.
"IoT": The Internet of Unpatched Linux Devices...