Again, that's the same point
@Beijingwalker raised before. That's call Airspace Management and Deconfliction
You can't send 1000 drone on a target, because there are only 1 attacking lane on any given target, 1 way in and 1 way out. You can stack 1000 drone at the same airspace but only the bottom one can attack, otherwise the top one would attack the lower one in the same air space.
And also, if Ukraine really loss a lot of people Russia wouldn't have issue taking town, and the very fact that Russian LOST Russian territories to Ukraine when they are the one attacking is appalling, because that mean you either seriously underestimate your enemy and did not put troop on your border with
THE NEIGHBOUR THEY ARE INVADING, or you don't have enough troop to secure the border, either of which is not really a good thing.