Agreed that it can often be a case by case thing.
Apologies if I am not remember it exactly correct, but there was a story from earlier this year about a family of six (married couple and four kids, IIRC) that were in Nebraska (I think) and a tornado struck and one of the parents and three of the kids died. If you are the remaining parent and child, I cannot imagine how you go on living after that, much less the living parent finding a way to work again any time soon. Granted, most deaths do not occur as the result of (what I would call) a random tragedy like that, but I think you will all get what I am saying.
I asked my cousin, who is an HR guru, about this, and he said 5 days seems to be the industry standard now here in the US, but the company for which he works is located all over the world, and he did say that the people in Europe always marvel at how limited our vacation and bereavement days are compared to theirs, so it is definitely different here vs there, and I think that explains the disconnect we are seeing between some of us here, as we all look at it through the lens of how it is in our country, job, state, etc.