Do that many people actually have 4k? My pc monitor is 1080p 144hz just because I saw no need for the higher res at sub 30in size, and the higher fps seemed way more obtainable with the card I had at the time (1650super then, now have a 2060). I also own two 1080p tvs that were bought a few years prior. Not about to just throw them away for a few more pixels. Seems a waste. Used to keep CRT tvs for years.
If you don't have at least an LG CX then GTFO. Throw those 1080p tvs in the trash or use them to display the weather or spotify. My feces has better image quality than your monitor.