If someone truly believes it is “Utopian” to expect human interactions to be voluntary, how would you like being one of their family members, or a neighbor?
Do you think they’d be a good cow-orker or employee? (Be careful while orking cows!) Could you trust them at all if you weren’t holding them at gunpoint?
Are they really that barbaric, or are they talking through their hat; not understanding the concepts they feel the need to preach at you about? Perhaps they are just saying what they feel needs to be said to justify archation. I suspect it’s that last one, since they are apparently still alive and able to speak, so they must be choosing voluntary interactions the vast majority of the time.