There are many European sausage recipes that call for curing meat before making sausage. Here is a good read that might explain the reasoning:
Curing meat for sausages
Raw meat materials used for sausages were cured first with salt and potassium nitrate or sodium nitrite and then ground, stuffed into casings, smoked and cooked. Whole meats such as loins, butts, hams and bellies were cured whole and then smoked.www.meatsandsausages.com
Learn something new everyday. Gotta love SMF!The Polish almost exclusively cure meats prior to making sausages. It’s a texture thing that can make a superior end product. I’ve done it both ways and mostly choose to not pre cure, but pre cure is a big thing in certain areas of Europe.
Your recipes include a 3–4 day curing step at 38–40°F to allow salt and curing agents to fully penetrate the meat, ensuring food safety, better flavor, and proper texture. Older recipes, like those from The Sausage Maker, follow traditional methods. Many modern online recipes skip this step for convenience, especially if the meat is fully cooked afterward.Curing the meat right away before you take the time to stuff the sausage is a good idea if it will take a long time. Stuffing sausage by hand with your finger and a broken bottle might take all day if you happen to live in the Soviet Union or the like. Getting Cure on the meat as soon as you could may have been a very necessary food safety step when you were making sausage to survive with no special equipment, just a knife and meat. Cutting mince by hand without a fancy meat grinder takes time.
I make sausage by cutting the meat with just a knife and hunk of oak firewood which has been flattened. It takes time, so you either freeze your fingers or throw some cure on the meat check more recipes at pythagorion restaurants.
That's my guess. Putting the cure on early helps me make sausage slowly without worrying so much about the meat staying freezing cold or turning brown.