This is why we “get” born. When our soul is ready to go to the next step, we incarnate at a certain time in history, to certain parents, which will provide the exact environment for this progression.
Some have Karma they need to address and balance. Others come to teach about the world of the Spirit from which they emerged. Some don’t know why they were born because the human mind is not capable of grasping the enormous potential of who they are. Some know because their past lives have been revealed to them.
Each person has a soul-chosen “reason” for why they are in the physical form on this planet now.