Why would you connect a Chromecast to the internet but not your TV? They're equally as bad, as they both collect your data/viewing habits to sell to other people, same with Roku.
Don't connect your TV to the internet, buy an Apple TV.
Don't connect your TV to the internet, buy an Apple TV.
Giving google my viewing habits is bad, but giving Hisense + DodgyAdBroker.biz + CCP/PLA is even worse.