Lawyer....? -

Lawyer is a popular career but is it because of the money or because of other reasons like people would know how to defend themselves better if they get into a fight or people would not mess with them.

I think people go in to law because they want to make good money and have a prestigious career, but are lousy in science. There are a select few who sincerely love law, but they are th exception rather than the law. I highly doubt knowing how to deal with someone in a fight would be a compelling reason to pursue a career in law.