Ever wonder what the business world would be like if you couldn't trust your partner?
Think you would succeed in your projects if there was no security to support your work?
If you have already thought about it, then you came to the conclusion that this is not feasible and, therefore, the non-disclosure agreement is essential for your project.
It is not enough to have ideas or financial capacity, not to mention know-how. If there is no way you could protect all these issues in a confidential manner, you will quickly be overtaken by the competition because "walls have ears" and one could never be too careful.