So, why waste the lives of your precious creatures blocking the attacker when you can simply destroy it
Leading by example, the decks Commander is the Vampire Knight Edgar Markov , who is not only a strong creature on his own (thanks to Haste and First Strike) but can also provide your board with 1/1 Vampire tokens, as well as buffing your strong Vampire cards when he attacks
No, but that's a good thing
When you lie you basically remove yourself from most political action for the rest of the game at a minimum, but also might lead the player you lied to or maybe even other players to take actions against you out of spite
While Magic: The Gathering is a game that is often played one-on-one, the largely popular Commander format is meant to be played with up to four people
Johnnies like it because it's good at being added as a body to decks with sacrifices or artifact-based triggers