Have you ever baked “healthy” muffins? I remember it was all the rage some time ago to substitute applesauce for any oil you used in baking. It works just fine. It’s just a little weird.
If you look for baking substitutes online, you get a host of bizarre things that you can use in place of other things. Milk mixed with vinegar works for buttermilk. For breadcrumbs you can substitute ground rolled oats. If you don’t have baking powder, apparently you can substitute baking soda mixed with cream of tartar.
Substitutes can be great. Like in baking, you can even reduce the calorie count, or you can make bread that gluten intolerant people can eat.
But not all substitutions are a good idea.