compassion and tolerance are the weapons of real people!
It can be....depends. I DO think the wisest are kind. I think you can be wise about finances and be a jerk.....it happens all the time but there are plenty of wise people that are good with finances. I will say, if someone cannot put themselves into another's shoes, it would be hard for them to have the compassion they need to navigate through life, and bring about love and peace....which is the very foundations of life.
No, not useless. Wisdom can exist without passion. However, I would say that wisdom without passion (kindness) is less.