Open Mike.
Ebony (Diospyros crassiflora) and Blackwood (Dalbergia melanoxylon) are obviously different species so your cynicism has rather rebounded on you.
Jack Campion.
While Buffet might be recycling their waste by mixing it with resin and then re-machining it into useable parts for instruments, this is most likely to be for economic reasons rather than environmental. Any producer would rather turn his waste into cash rather than throw it away.
Another thought is that the dust from rosewoods, of which African Blackwood is a species, and Ebony has been shown to cause conjunctivitis, dermatitis and respiratory problems. So, if the waste can be rendered inert by mixing with another substance and then sold, both the disposal and the health problems are resolved together. The Health and Safety requirements of woodworking shops have to be seen to be believed!
As a matter of interest, African Blackwood which grows to about 4.5 to 6 metres, with a trunk of 0.3 metres, is more rare than Ebony, which grows to 15-18m. with a diameter of 0.6m. However, many people would call any black wood "Ebony", not recognising that Blackwood exists.
Most of the carvings seen in shops are Ebony and are from managed plantations.
Any timber used as a tonewood for musical instruments is specially selected and is far less common than the rest of the timber of the same species. Similar applies to figured woods used for veneer.
Colyn.