Why can't we have an undo button again?

[ElPared]

I understand the whole "spawn/move a runner to get vision and then undo" problem. Nobody give me that argument, I agree with it and accept it.

But why can't we have an undo button for if the Fog of War wasn't changed by the action you want to undo? Say I accidentally spawn a runner instead of a soldier, but I can already see more than 5 spaces around my base. I can undo and then do what I meant to without it costing me the game.

I'v'e recently lost a few games because I accidentally attacked a unit instead of a base, or spawned a dumb unit when I meant to spawn something else, and it's starting to get really old to just have to deal with it. I know plenty of players do similar things with Bombshells and Brambles too.

again, I'm not saying there should just be a straight up undo button, I just want to take back things I do on accident on occasion