Well for range or really dirty brass, I tumble first as most will. It keeps the junk out of your expensive dies!!
But I tumble for other reasons, like to remove case lube, that's done after resizing. As noted, you must be careful to get the kernels out of the flash holes. I deburr flash holes (1st time) and clean pockets every time, so for me there is no additional time handling the brass.
Neither way is wrong, as long as you remember to watch those flash holes.
CW