That's not so complicated. Somebody gave you an insanely expensive bottle that you would (or could) never buy yourself.
You now have the chance to:
1) Drink it yourself, alone
2) Share it with friends
3) Sell it to someone else
4) Let the whisky decide who she wants to drink her (??????
)
Interestingly number 4) is by far most common (and morally correct) in the modern West. As stupid as it sounds from the whisky perspective. Coincidentally, if you think about it, it is also often stupid for women (and men) in real life and a lot of the problems we have in the West stem from this.
However a large part of the world still follow 3), just like people in the West did for thousands of years.
Some people do 1) or even 2) but, although they are not mutually exclusive with 3) or 4) I do think it's a minority.