Halo excelled at being a FPS on console before auto aim and aim assist were a thing. The terrible, tank-like movement and super floaty, slow jumps would be trash in any PC FPS around its time. But having players move at Quake speeds in Halo would be frustrating, and no one would hit things in multiplayer.

Or would, on a game without modern control assist, anyways. Games don't tend to be as fast as they used to, and Halo has really sped up as a series, but it is still on the slower side.