Unfortunately, the options for non-smart TVs keep getting narrower. Manufacturers want to inject app access into every device they can. You can't even buy a UHD disc player without an app platform coming with it.
Do other manufacturers force a connection in some way?
An entry-level 32" Samsung is $200. I wouldn't be surprised if having "smart" capabilities subsidized the cost because Samsung gets kickbacks from, say, new Netflix subscriptions made from the TV itself, or some services pay for inclusion. In other words I don't even think you'd be avoiding any serious $premium by finding a dumb TV.