that some operators will take a nice safe ten thousand foot field and bascialy fly as close to the end of it, reducing all that margin, in order to save on overhaul costs 5 years from now
and by looking after the engines makes it less likely to have an engine failure in the first place.
You seem to have the wrong idea about airline pilots. We make procedural decisions based on risk assessment made by manufacturers and authorities over many years, often learning from other peoples misfortunes. When the situation is out of the box we will make the best call to safeguard our aircraft and passengers.