What is the evidence that a small group of companies has the superiority wisdom to determine who aught to be allowed to speak to the masses? We elect governmen

What is the evidence that a small group of companies has the superiority wisdom to determine who aught to be allowed to speak to the masses? We elect government democratically, and through that create laws and police. If the internet is full of criminals flaunting laws then the problem is right there in the lack of laws and police, not in the lack of control from a small group of companies.