the brain only pays attention to what it THINKS IT NEEDS to pay attention to. the brain is remarkably good at filtering out a ton of nonsense. so good that it filters out its own nonsense from time to time. so even though there are times when your brain might think "hey i should pay attention to whether or not my car is locked" there are plenty of other times when the brain just doesnt give a fuck about it. so even though muscle memory makes it happen, the brain has no care. ADHDers know this struggle because the brain struggles to find things to care about for long so there are a lot of muscle memory things that fly under the radar