Rather, the rationale is to design a framework competitive order in such a way that decentralised decisions yield the best possible outcomes for the economy as a whole. For this to be possible, economic power, for example, also needs to be kept in check.
This school of thought posited that government intervention is legitimate and desirable, provided the interaction of individual decisions produces a better outcome as a result. Yes, it may even be justified to replace the market mechanism. Ordoliberalism, then, is by no means an approach that is hostile to government or regulation.