Mechanical sympathy applies.
I once got to the staff carpark at the same time as a group of ground handlers. They obviously had some sort of private race going on, or were trying to beat the traffic. They each started their car engines and as soon as the engines caught, they all accelerated away like mad things.
Every one of their engines sounded like a bucket of bolts, i.e. worn to buggery because of working the engines hard before the oil was warm enough to circulate fully. Now, think of a gas turbine engine, parts of which are under much higher stress than a car engine, especially at take-off power.
As well as seals, and thermal stresses within the engine, the oil needs to be warm enough and fluid enough to get around the engine easily and quickly.