Meatwad of course it is. You know better. It's a very big deal to players. The managers voice is the soundtrack they play the game they love to. Every single training session there he is, in their ear. Every single game. Every team talk, every hand clap, every piece of encouragement. On the fly, instinctive positional adjustments to counter a tactic or dangerous pattern he has observed. To exploit a hole, a weakness.
The energy.
You can't replace that shit.
