There are three primary benefits to having an
autonomic nervous system.
The first is that it is
autonomic -- it runs without you having to think about it, so that the things you want running without having to thing about it do run without you having to think about it. Your
heart beats, your
lungs breathe, your
bladder blads.
The second is that it is
nervous -- not in the sense of being beset with
anxiety or on edge about what the future holds, but in that it uses
nerves to connect things to the
brain (as discussed just above, the parts of your brain which run things without pestering the conscious parts.
And lastly, the third is that it is a
system -- not a one off
cluster or
bundle of nerves, but a group of them running all throughout your body, wherever autonomous nervous control is advisable, and coordinating the autonomous responses of multiple organs to a single stimuli.
In closing, an autonomous nervous system is an excellent thing to have, and if you don't happen to have one, I highly recommend looking into getting one.
Blessings!!