Encryption only protects files at rest. The vast majority of attacks are against live systems connected to a network, where full disk encryption won't help you

Encryption only protects files at rest. The vast majority of attacks are against live systems connected to a network, where full disk encryption won't help you one bit. It is a nice extra layer of protection for when a device is lost/stolen, but I don't consider it a primary form of protection for any important data.