I' d like to add a few potential reasons:
A. The big difference between jet aircraft compared to cars and golf balls is the speed they travel at.
I believe that a dimpled airplane would help formation of shockwaves and sensibly reduce critical mach, increase shockwave-induced drag at high Machs.
B. The manufacturing could become a true cost nightmare.
C. From a maintenance point of view, it would be a nightmare to discern surface damage on a dimpled surface.
D. The dimples would require a sensible addition of material, hence more weight.
E. The dimples could become a hiding place for dirt, hence increase drag.
My 2 cents.