I will admit that I am a social diver as I enjoy discussions after the dives. I was also taught by my Cavern instructor(Lamar Hires) that solo diving in a cave environment is acceptable and commonplace as there are numerous redundancies in place. He did, however, mention that the benefit of diving with a competent buddy adds something very important. an extra brain to help think through problems that might arise during any dive.
When I dive with someone more experienced than I am, I might just learn something. When I dive with someone less experienced than me, I work on my buddy skills, and THEY might just learn something. Just my $.02.