Yeah they are missing out on money. I'd spend the 1k to get rid of the chrome if I could today. And now theres a midnight edition for every 1500 trim except LTZ for 2024. The 18 LTZ Z71 was body color IIRC
My guess its its a parts issue, or Chevy really doesn't want buyers opting for LTZ with body matched bumpers. They'd rather you buy the High Country which is a more expensive body color truck that makes them more money. Leaving the LT and LTZ for the chrome lovers.
I think its a mistake, but I've also come to like the current LTZ look after seeing it multiple times a my local dealer. They are stacked full of them. Fiancé still hates chrome which is holding me off.