Never ever connect your "Smart"-TV to your network, or if you have an incurable impulse to then make sure it's on a firewalled gateway-less VLAN. Take the money you save buying the thing (compared to what a profitable "dumb" version would cost) and buy a surplus corporate mini-workstation system, and slap LibreELEC/Kodi or whatever on it, and use that device as your "smart" device. No good for you can ever come from…
I've heard this wisdom before, usually with an apple TV positioned as the alternative, but I've had that setup before and didn't enjoy having to use 2 remotes instead of one. A better solution would be to root the damn TV and neuter its spyware/adware crap.
I keep the Apple TV remote around for extremely rare situations where that doesn’t work but even then, my cell phone has a built in Apple TV remote as well, which makes it even less necessary