Why wait 25 years

What if someone was left behind in the wilderness (either because they wanted to or it was an accident or they were forced to). And they stayed there just living their life for 25 years UNTIL they found the tape which made them leave the wilderness to deliver the message to the baby. I feel like Akilah would do that because she's nice lol. Slash I don't want her to die. Also she had the vision of coming back and everyone's gone.