But I do wonder how it came about that a dark, reddish hue came is the "norm" for mahogany. Is it perhaps to homogenize different hues of the wood?
The reason for fill and stain on any fine piece of wood is to enhance the natural grain and beauty of the wood.
Now how do you do that? What color is the grain filled with? What color stain should be used? These are all questions answered differently by different societies at different times.
For instance 50 years ago here in the Northeast USA mahogany pianos sometimes came with a much lighter finish like this Story & Clark console:
Pianos that were refinished around that time sometimes use lighter stains because they were popular. We see a fair amount of beautiful Victorian pieces that were refinished at that time to reflect the popular finish of the day.
Here is one that came in quite blonde that we refinished to closer to its original shade. The customer requested high polish polyester:
Also, Northern Europe still enjoys lighter stains in general. The first bubinga pianos coming from Estonia were this shade:
Today the company tries to appeal to the broader taste of Europe and America with a darker stain:

Sorry I could not find better examples, but it is still early here in the Philly area.

My 2 cents,