Beacause life is a *****
informs you of what?
Are you sure that whenever someone informs you of something they are rude?
I suspect that some people come across rudely as they are annoyed that they need to inform you- you should have already known. Others are a little blunt because they misjudge you and want to ensure the message has got through. And sometimes we think someone is being rude just because we didn't want to be told.