It’s the consumers that don’t care. So the manufacturers don’t bother.
So many turntables these days are weird USB enabled devices made for the occasional playback of an album purchased for the retro novelty. People discover and listen via streaming services, not by digging through crates in a dusky shop.
Even DJing has changed, and software can beat match perfectly without needing a visual indicator, and your whole set is stored on a drive.
I’ll never forget visiting my friend who set up a turntable in his rec room and proudly played something and made a comment about the warmth and superiority of vinyl
I went back to his receiver and moved the connection to the phono input and told him there, should sound a lot better now.
He just didn’t notice or care. The act of handling vinyl was what he wanted.