Speaker facade

Does anyone have some insight into why so many speaker manufacturers (even at the very hi-end), who dedicate so much care and craftsmanship in wrapping the sides and even rear of their speakers in stunning wood veneers and layers of high gloss clear coats, continue to clad the entire front of the speakers (the face most visible from the listening position) with a plain, black finish piece - whether it be metal or plastic or leather, etc.?
Because it matches anything? 
Because it often (perhaps mostly) is covered by a grill?
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For me, having the drivers hidden makes the speaker look more like furniture.
Sandy Gross has publicly stated in an interview with John Atkinson that (paraphrasing) the sizing and general shape of the front of the Triton Reference are essentially identical to the width of a grown males head. He goes further to add that the shape and sizing is advantageous from a sound voicing reproduction perspective.
Because speakers are for the most part - black?
I assumed that they are trying to reduce reflections on the front by having flat or textured surfaces???