So? Lotsa people in Northern Europe, Montreal, Minneapolis, Fargo, (not to mention Buffalo, NY) live in pretty much those conditions for much of the year. :-)
Full Disclosure: For that half of the year, I prefer Arizona.
Neanderthal bones show lots of healed breaks. Some web site I stumbled across says they have the skeletons of old rodeo cowboys.
That shows they cared for their sick and wounded. It supposedly also shows they hunted large animals, perhaps with thrusting spears (pikes) rather than throwing spears.
But if you're right it may only mean they were the inventors of skiing.