[lamontcg]

> If you just use them all the time, you don't have to remember to use them in the right situation.

I know of dead cave divers who followed protocols only when they really needed to and then one day made a category error and didn't follow the protocol when they really needed to.

I've gotten crap for following through the motions of protocols when they I "didn't need to" but if you do it all the time then you never make those kinds of category errors. There's no downside to always following protocols, there's high downside for making category errors that you wouldn't make if you just always followed protocols.

Similarly you should always use your parking brake, even if you are on flat ground so that you never make a category error there (or just get hit by someone when you're on flat ground and have a rollaway).

Similarly, signal your intentions every single time. You're doing it for the pedestrian you didn't see, or even just some idiot flying up the shoulder of the highway who shouldn't be there, but signal your intentions to take the exit so you move predictably.

See also the normalization of deviance: https://www.youtube.com/watch?v=Ljzj9Msli5o