Commies and those with control freak viewpoints will attempt to standardize violently, will take away uniqueness and enforce mediocrity in any way they can.
Personal freedom diminishes because personal freedom is risky and scary, everything has to abide by the central powers and what they dictate.
Unfortunately this takes away from the most beautiful aspect of humanity, decentralization and emergence. It always leads to misery and widespread death, of course, since you're taking the specific difference that separates humans from animals.
Similarly, when you prevent people from freely trading and signaling truth through currencies, you prevent civilization from doing what it does best.