as someone that has worked with tvs for a few years I disagree strongly. Speakers are a lifetime purchase. A TV is not. Professional displays are super expensive (and often dont come with speakers). The pricing will also change a lot depending on the size. They are made to run 24/7 on airports etc. Today there aren't many display manufacturers anyways. I would never spend 4k-20k on a professional display to use it as a TV.

you can still buy 30year old speakers for 200-400 and consider it as a buy it for life purchase.