Of course, numbers in general are good and are an important element in describing experiments. Like "We took pictures of at least 5000 cells in 592 conditions." That gives a sense of the scale of the experiment and is important for the interpretation. But if you just say "We imaged a total of 2,948,378 cells", then that provides very little useful information about why you imaged all those cells. Are they all the same? Is that across multiple conditions? What is the point of this number except to impress?
And before you leave a comment, yes, I know we did that in this paper. Oops. I feel icky.