Free market not only gives freedom to individuals. It also liberates society from burden of the weak members.
The weak must perish, so the strong may flourish.
...There has to be a balance, harmony, somewhere, but a "dog eat dog world" certainly doesn't promote this. Bottom line, a 100% deregulated market is the same coin as a 100% regulated market as both are so far in the extremes they are right next to each other.
At some level, the only practical difference between a 100% regulated society and a 100% deregulated society, is that in the regulated case the big dogs can use the coercive power of the state to justify eating the little dogs.