Or maybe i really don't have time for it? I jump on the computer in between jobs at work and quickly type out a post before continuing with what i was doing. This means that i am a complete tw*t and i will never get a flying job.
If you had 1 minute to do the pre-flight inspection, pre-start and after start checks, im sure you would make a mistake but maybe you could take your time with all the checks and have just done the best pre-flights ever.