Except 100% Free Markets lead to Monopolies. Then the argument is, those big companies are 'Free' to crush all competition and innovation.
But to prevent monopolies, you would need regulation, something to prevent them from forming, and then that is then 'Not-Free'. How dare you prevent me from having a monopoly.
It's a conundrum, if there is no oversight, regulation, then you are totally free to prevent other from having freedoms. It's just who do you want in control.