I think the most accessible evidence for the likelihood of anything nearing a "utopia" is right here in the discussions people have about it. You have divisions

I think the most accessible evidence for the likelihood of anything nearing a "utopia" is right here in the discussions people have about it. You have divisions, factions, "camps"...opposing points of view on this and anything else that human minds might ponder. As long as people are capable of disagreeing with each other, you will never have peace. While you might try to put constraints on how damaging a certain division might be, that form of control or "management" will only produce a feeling of oppression in those it would constrain, no matter how well intentioned. As long as anyone can feel disenfranchised or marginalized at any level (the key here is "feel", again, intentions don't matter), you have the seeds of rebellion.