Because human beings are able to think, they possess free will. Their abilities and knowledge are however limited. Which is why their free will is equally limited.
Nevertheless, choices must be made, using every ability and all knowledge thus far acquired. Even by not choosing you choose because not choosing is also a choice. It is therefore important to acquire sufficient knowledge to make the right choices.
The knowledge of reincarnation and karma is especially indispensable because it enables you to become part of the solutions to all modern questions, independently and without being manipulated by others.
Inner wisdom is certainly necessary to make a balanced choice in matters of life and death.