Learners differ in the ways they can be engaged or motivated to learn. Because there is not one means of engagement that will be optimal for all learners; providing options to build interest and commitment is essential.
Providing different points of interest is a great way to motivate students to engage with learning and put forth their best efforts. Any time I am genuinely interested or passionate about a topic, I produce my best work. When students are learning about someone that is relevant tp them, their work feels important and their learning is enriched.