Mistake happen to the best !
Well said SASless !
Cujet, we are not saying that those pilots were not professional or competent.
As a pilot, you spend you life avoiding mistake, you will always do some and you always hope they gone be minimal.
If you read accident reports, full reports with all details, in most cases, pilots had experience, were competent and professional.
You just need a very small period time during a flight to do something wrong who could be " hola, that was close " or "now it's to late" with a bad result.
Pilots are human, not machine, you can fly 10 years without a single mistake or do a bunch of them in a short time.
You never know, sometimes, you get to comfortable in what you do and it brings you on the wrong side because you did not anticipate the problem.