Just spit ballin’: The TVs don’t have “yellow” cuz we don’t have the cones. TVs are built by humans for the use of other humans. Why would we design them to produce light that we don’t have the cones for?

If we all only saw black and white, we wouldn’t have developed TVs with color. If we were all blind, we wouldn’t have developed TVs at all

Edit: I think this has interesting speculative fiction implications regarding technological development, especially in scifi