wow. I even re-route the washer discharge to the lawn, so it does NOT go into the septic.
And when I had the jaccuzzi's and it came time to break down and maintenance clean, it went out on the lawn also. I wouldn't ever dump it into a septic field.
I guess it depends how long you have had septic's and what region you live in, to realize that you DO need to take care of them so you don't end up with big septic repair bills down the line. Live in a clay based region and it's 'all about' how to keep that drain field happy!