Many of my students HATE reading out loud. They are often self-conscious about their pronunciation abilities. For those who are good readers, reading aloud forces them to slow down, and they can easily get impatient.
However, reading aloud makes us interact with the text in a different way. Research suggests that it can improve retention. It forces us to focus on the text, and invites us to engage with it more deeply. I find that setting a few ground rules for reading aloud makes students more willing to at least attempt this seemingly unconquerable mountain of a task.