It's not a lot but that was my initial reaction too.
Maybe one day I will undergo a past life regression--my only hesitancy is I do not think I can be hypnotized and besides I'm content for my spirit guides to reveal snippets to me in my channeled meetings, either when I ask or when they decide to reveal on their own. Only key facts of about 5 of the previous lives have been revealed to me.
As for what you read, personally, I think that's total BS. We would never get assigned outside of our choice. Even the soul of my father, living this life as a throw away life as his penance and as part of my lesson plan, willingly agreed.