I dont think this article is completely correct, and I dont see padding as a "trick". If the arrival window is more accurate by adding padding to the flight tim

I dont think this article is completely correct, and I dont see padding as a "trick". If the arrival window is more accurate by adding padding to the flight time, then I can plan more effectively when I get to my destination. Aren't airliners also flying slightly slower than they used to in an effort to save fuel(and lower emissions)?