Originally Posted by
IFlyEm35
Multiple reasons. Mainly even though you can identify objects when they go by at 200+ mph they are there and behind you pretty quick. There isn't enough time to really make much of an evasive maneuver. Airliners that are dirtied up aren't the most nimble machines. And even if they were you can run into issues with aircraft on parallel approaches..
It's not only dirtied up it's on low throttle on descent. And it takes time for a turbine to spin up. If Sport was as smart as he tries to make everyone think he is he wouldn't have even asked the question.