1) Because once mass contact begins without oversight, people get messages like "VOTE FOR KEITH ELLISON OR YOU'RE A FUCKING SELLOUT BITCH". If you want to deliver a message then attend your local and state democratic party meetings and get involved in person - where you are more likely to be civil than through anonymity of an email (this applies to everyone, not specifically you OP).

2) It's a mostly useless race and a useless position and everyone from the DNC to Bernie to people here are putting FAR too much weight into the position. It's a purely logistical position and nothing more. Ellison as chair isn't suddenly going to make every democrat in congress magically more progressive. Just like a non-Ellison chair isn't going to soften the Bernie/Warren wing of the party.

It should have been a two week election and then hit the ground running. Whoever decided to make it months long spectacle is a moron.

3) They are party officials and not public elected officials. So their duties are different. Again - start getting involved at the local and state dem stuff if you want to start influencing things.