I think you make a good point, but you still need a legal and court system in order to enforce the arbitration clauses; they build on the legal system but don't

I think you make a good point, but you still need a legal and court system in order to enforce the arbitration clauses; they build on the legal system but don't replace it. If you didn't have the underlying court system, there wouldn't be a way to hold parties to decisions made in binding arbitration that they didn't like.