Yes, it is a contradiction, but a valid one. Similar to other ones: for life to evolve, we must die.
Or, on a more poignant note in this context: for freedom to flourish, one must deploy paradoxical rules. The point being that free-markets can only flourish when a preemptive playbook of rules is established. Or otherwise, the trust in any marketplace will be eroded by a free-for-all turned sour by the pillage-and-plunder of a few.