This was my thinking as well, plus addressing the ‘solution for those without IT experience’ bit. Search for video/article on removing wireless connectivity hardware, grab your screwdriver and get to work.

Still takes some work, obviously, and a lot of people are scared to void warranties/open up consumer electronics, but from the outside it sounds more straight-forward than futzing about with network settings. IMO worth it if concerned about the connectivity bits, willing to do it and the price is right for the TV as a dumb TV.

Alternatively, use used dumb TVs for as long as you can.