Why is the urinary tract not considered part of the pack of the digestive tract?

Why is the urinary tract not considered part of the pack of the digestive tract?
The urinary tract is not connected to the gut in any opening. It has separate vascular supply and have no direct physical connection. Urine is made by the kidneys, which filter the blood within systemic circulation - as opposed to the portal circulation of the GI tract. The blood comes directly from the aorta into the renal arteries and after into the kidneys. Blood is filtered contained by the kidneys to remove waste and the resulting filtrate is urine. The urine after drains down the ureters into the bladder and then pass through the urethra out of the body. At no point in the processes is at hand any connection next to the GI tract.
The urinary tract is connected the bladder and kidneys (which filter your blood). Nothing you eat go through there directly.
because they are completely different systems. the urinary tract filter stuff out of your blood stream. it has nil to do with digestion.