It comes up nearly every time this topic is discussed here, but commercial series displays are what you are looking for. Prepare to pay more, but in exchange get a display that just functions as a display.
(or, there's benefits to having a non-"smart" tv)
LG's IT line[1] is not unreasonable in terms of pricing, especially if the purchaser is also paying the electric bill, demands long-lasting color accuracy or otherwise wants a purpose-built solution. I have not used one and I don't know if budget display manufacturers like TCL and Vizio have comparable products.
1. https://www.lg.com/us/business/commercial-display/it-product...
Sure, but lower demand would usually mean lower price, unless the consumers are willing to pay extra for something that other products are missing. In this case, I'm not sure what the other products are missing in comparison, but I'm also not familiar with these TV's.