Innate or habit?

As a teacher of many different age groups I have noticed a trend with all of my students, while playing a piece, that they should have practiced. When they make a mistake, they almost always want to go back to the beginning and start again. It can sometimes be a bit frustrating as a teacher, but I have been starting to analyze why this is such a trend. I do teach my students how to break down pieces when they practice, I also give them a new piece or sightreading most lesson, so that they become used to reading new music, but they all want to start at the beginning if they make one little mistake.

So, my question is, is it an innate thing that makes us want to have perfection? Or is it habit as human beings to strive for perfection, and so once you have made a mistake you need to wipe the slate clean and start again?

For those who are not musicians, the reason this can be a problem when playing through a piece or sightreading, is that it is important to move on and keep playing music even if you make a mistake. You might do so while performing one day, or playing with a band, and you certainly can't stop and go back and fix a mistake. Yes, while learning, you can then go back over the parts that you don't know so well, but that is a different exercise in itself.