There are extreme cases where this sentiment doesn't apply. For instance I have seen it used in an argument about 22lr vs 17hmr about the only difference between the two was how much wind effects them since you can just dial for elevation. BUT we forget that GPS and LRF are not perfect and we have spread in our MV (especially with rimfire). According to my applied ballistics app, midas + at 1100 fps (not sure what the real world velocities of it are but this sounds about right for subsonic 22lr) has a drop of 38.8 MOA at 300 yards. At 310 yards that drop goes to 41.1 MOA. And 301 has a drop of 39.05 MOA so a 1 yard difference translates to a .25 MOA difference. And if I use 1095 fps then the drop at 300 becomes 39.00 so a .2 MOA difference for 5 fps.Drop can be dialed.
So in theory, "Drop can be dialed" is true but when you start to get into the extremes, those things we took for granted as negligible start to creep forward and become a problem that we can't account for.