The dimple is used to trip flow to energize the air flowing over the surface and reduce boundary layer and delay flow separation. There are many ways to do it, such as vortex generators you see on the various places of F1 front wings as well as areas around the intake and etc. You could put those vortex generators on a golf ball, but it may make it hard to hit or roll it on the green
Also, all aero surfaces need to work together to produce proper balance and right amount of downforce (or lift for air vehicles). The front wing needs to generate downforce, but it also needs to channel air flow over the top of the front tires as well as into the front brake duct. The air flow then needs to be controlled and directed into the engine air intake on the top, the sidepod for cooling as well as the diffuser entrance that's under the car. It then needs to go over the rear tires and rear wing, as well as interacting with air exiting the diffuser and the hot air flow from engine exhaust. They all have to play well together, that's why teams spent tons of time in CFD and wind tunnels to make sure every bit of aero surfaces are tuned to work well together as a system.