Because the intestines, liver, pancreas, and gallbladder are so proximal to each other and closely associated in function,
Unfortunately, many cats are being & have been diagnosed with pancreatitis when often, there is also IBD & other organ involvement. There is also that pesky shared bile duct which makes it all the more interesting

.
This is really the double edge sword of an easy blood test like the Spec fPLI. Even with an ultrasound added to the initial diagnostics, depending on the level of inflammation at the time, organs, including the pancreas & intestines, may not appear thickened or changed on the initial ultrasound done. As a result, cats leave with a diagnosis of pancreatitis. Vets are becoming more aware of this issue & when they see the history, are making pet parents aware that there is more than likely more to the situation with added differential diagnosis.
With respect to fat, the one recommendation that has changed in more recent years, is that instead of the nutritionists & specialists stating that fat is a non issue for cats with pancreatitis (if that truly is the only issue), they now recommend a true moderate fat diet. This is key because many of the canned foods, especially lower carb cat foods, have a high fat content vs a true moderate fat content (especially when you calculate actual grams based on calories fed to a specific cat). This turns out to be a problem for a decent percentage of cats with pancreatitis &/or inflammation of the GI, gall bladder &/or liver.
In addition, some of these cats cannot & will not tolerate having to eat a lot at one feeding or even eating too many small meals across several hours to bring BG up &/or tolerate a mix of foods/ingredients

.
For this reason,
management of insulin dosing vs management of BG using various foods/multiple feedings/testing (aka “feeding the curve”) becomes the preferred strategy for some of these cats.
This just simply means not taking the risk and shooting lower #s at times &/or taking some dose reductions earlier or by a greater amount in order to to avoid being forced into the situation where you need to increase BG with food. Obviously, there will be some instances (hopefully not too many!) when a situation may happen & using honey, syrup or maybe a particular food you have found that will work without causing an issue, is fine

. However, the goal is, to the best of ones ability,
avoid dosing that results in these situations.
You are definitely still able to get to where you are going.....
the same exact place....it is just an alternative way of getting there based on the specific needs of & what is best for your cat

. Win/win

. Again, strategy & management that is based on risk/benefit

.