You can get a smart TV and just not connect it to the internet. Even lobotomized like this, they still work fine as normal TVs.

You can also get a smart device (Roku, Amazon Fire, etc.) and hook that up to any TV to stream things (including Disney+). You can also just hook that computer up and it would work as well (a TV is just a big monitor with sound).

So there is no need to ever "cave", even if you want streaming on a big screen and don't want a smart TV.