Well, it's this thing called micro-management, to put it simply you control many many people at once more individually then just en-mass. To properly micro-manage you have to constantly pay attention and communicating, via messages, and such will just waste time by preventing you from watching your troops.
Also alot of them are just dicks.
A tool is a tool regardless. I mean if you suck, you suck, and not even the most perfect tool could save you. And if your damn good then even with the worst tool ever conceived you could chug out some high quality shit.