Spine 2D Animation Course | Fundamentals

Hello! Hope it's not a bother, I've just finished the course and was thinking of making a rig to test some things and a doubt came up. I noticed that, for example, in the Mix-and-match project, they use path constraints for the legs and arms. Also if I remember correctly, there's a snake/dragon that has a similar setup on the neck. What's the benefit of doing that compared to a "basic" rig with only bones? So far, I've only used paths for things that were constantly moving (like bats flying on a path). Thanks in advance!