Look, I am not sure why you would want white lenses, but there must be a market for it. Laowa isn’t the first and they won’t be the last lens manufacturer to do this.
Maybe if you own a white RED and you want to look cool by having a white lens and matching white accessories then this may be for you.
The Piano White version of these two lenses are priced at $649 USD for the 9mm T2.9 Zero-D Cine (RF mount) and $6,000 USD for OOOM 25-100mm T2.9 Cine (USD 7,500 for the bundle with 1.4x full frame expander and 1.33x rear anamorphic adapter).
Again, I am not sure why anyone would want to spend $1,000 USD more to get the exact same lens in white. Each to their own.