I've heard a lot of caucus-system supporters say that the delegate process is important because they are elected by their neighbors. Well, then why not just let the neighbors themselves choose candidates (in a primary)?
I've taken part in the last three caucuses and, trust me, it is nothing like the Norman Rockwell nostalgia it is made out to be. Imagine that weirdo political hobbyist you know with a fanny pack or too many cellphones on belt clips choosing your candidates. That's what the caucus system is.
These people love their hobby and their petty power.