Lots of smart people couldn't fix a puncture on a bmx.
My sister in law is one of these people. Got a masters in accounting yet needs a car with automatic lights because she keeps forgetting to turn them on.
Last weekend, and no, I'm not making this up, she rang us in a panic because the battery on her car was borked. I ran through some simple tests over the phone, like is the solenoid clicking, check the fuses, etc. Nothing, dead as a doornail. Not even a click which was a bit telling. Her neighbour came outside, took her car out of Drive, put it in Park, and fired it right up. It's amazing.