This just isn't true. People could stop buying new TVs altogether, we aren't talking about food or blood pressure medication. This is a luxury item. If I had to guess I'd say most people purchased their last TV because it was bigger than their old one which still worked.
I'd also like to bring in another thing: that people don't care that much about this aspect of privacy. They care that their neighbor don't see their naked bodies, but they don't care that their viewing data might end up in a datacenter or whatever. This surveillance is too abstract to be meaningful to the layperson, there's no feedback of it at all, everyone's doing it, and practically nobody got hurt so far.
So a boycott of an entire product category is a hard sell. Not just because of lack of alternatives, but because the incentives are just not there.
Think of running emulators directory on the TV, or turning it into a VNC/RDP/X terminal.
The problem is that if you want a good OLED, there isn’t much of an alternative. Even if you don’t buy from LG or Samsung directly, they make essentially all the OLED TV panels on the market. A Sony or Panasonic OLED is still built on an LG or Samsung panel. So if you truly want to boycott them, your options for a quality modern display are very limited.
I bought my C1 before I was aware of how bad LG’s privacy posture was. The point of my comment is that you can still get the panel quality, and even some of the “smart” capability, without feeding them data, as long as you’re willing to treat the TV as a display and nothing else.