It has a rough surface in the way that it makes it uncomfortable to walk on, but not in the way that tires will grip to it. Stones are oddly-shaped, but slippery.
But not the right kind of grit rough. The 'stoney' rough asphalts can be extremely slippery when wet, and even dry they then to extend breaking distance.
My guess is they also cause more rolling tire wear and slightly more fuel consuption.
I’m not sure how you could have worse grip when braking (caused by lower friction) while simultaneously increase tire wear (caused by higher friction), unless I’m misunderstanding something.
Static (resisting sliding) vs rolling friction.
Tire wear is not just friction. The uneven coarse grit can pound, cut, chip and twist the tire surface all while having less grip/friction.