That is far from a tragedy. Aside from the fact that 'how little of the animal appears to have been used' is the exact reason we all have the benefit of this discovery, one should realize this extremely rare find is in no way indicative of how early hominids utilized the mammoth population they preyed upon. I'm not sure if you've experienced current Arctic weather, but feel free to compare it to any refrigeration techniques of say, the 19th century, and then consider that at the time of the kill the world was a colder place. It is not unrealistic to assume that roaming hunter-gatherers would find it more efficient to simply store the meat of a literally gigantic kill at the exact site of the kill; harvesting what they needed, when they needed it. If you can assume that, it's not a far leap to assume that those who made this particular kill were unfortunately deprived the opportunity to fully harvest it.

I'm sure if you were around back then, there would be a zero probability such a 'tragedy' could ever occur. By the way, super interested in all of your current acts of altruism that might directly or indirectly combat the innumerable current 'tragedies' levied by humanity on any other species. I'll donate $1 USD in your username to a charity of your choice for every one you feel compelled to list. To deprive a cause you care so deeply about an influx of capital, I dare say, would be a real tragedy.