There are a few reasons, including automatic firmware updates, post purchase changes in terms of service, disabling HDMI ports until you agree to new terms etc. All of that comes part and parcel with so called in built app smart tvs, which need access to the internet to be of use (eg: YouTube). Once that’s enabled…they work in the background to update self (yes, even when disabled, at least by basic means). Without it, the apps are limited utility - catch 22. See - Roku TVs, some TCLs, Sharps, FireTve, Blauerpunkts etc. OTOH There are devices (like older google chrome cast with TV - the ones that look like a oversized nurses watch) that sit behind your TV and can be solely powered by the TV. No visible cables, no visible anything, install Android apps to your heart"s content, disable google play services and telemetry, use Fdroid, install game emulator, video conferencing software (they have USB pass thru) etc. They don’t make those particular Chromecasts any more (newer model is basically same form factor as NVIDIA shield), but there were and probably still are similar “plug into TV and forget it” sticks, like CM4 in HDMI enclosure. TL;DR: I’m for having stuff perinstalled too…but not if manufacturer can change how it works after point of sale. If that’s the play, I’d rather roll my own. YMMV.