What does Skloot realize after watching the BBC documentary about HeLa?

After watching the BBC documentary about HeLa, Rebecca Skloot realizes the profound impact of Henrietta Lacks' cells on scientific research and the ethical implications surrounding their use. She becomes more aware of the personal story behind the cells, recognizing the lack of consent and the exploitation of Lacks and her family. This leads her to appreciate the intersection of science, ethics, and human dignity, driving her to tell Henrietta's story in a respectful and comprehensive manner.