I never connect my smart TVs to the network, I just plug in my Apple TV and move on. It's frustrating because it takes longer to turn these devices on than it should because of all the additional overhead I don't want or need. I wish someone would make a painless gadget to flash the software with dumber software that loads instantly.
They're also cheaper because they're subsidized. I did the same thing with a FireTV but understood the extra crap they want to boot and use is part of why they're so cheap, they're hoping for information to sell or puchases they can monetize.
I get why people like this, though. It takes all of your accounts and puts them in one place. Honestly, if I could run Plex and my own media through it, it would be tempting to just block it from dialing out and get rid of my Nvidia shield.