Our purpose is not to just teach negotiation tactics, although they do play a role in negotiation. The purpose is not to show you how to learn some new ways to grind your opponents under through negotiation.
Would you rather be right or effective in your negotiations?
Lawyers are great at law, but not usually trained in negotiation. We need a good lawyer AND a good negotiator (or learn negotiation skills ourselves).
Selling is not negotiating. Just as sales is its own skill, negotiation is as well. In order to become a good negotiator you must learn and practice it.
We are always negotiating. Negotiation doesn’t just happen when buying a car or home or negotiating a raise. Learn how to negotiate properly.