You can always go back to the fiat system in whatever jurisdiction, but it can still help. So let's say you are entering into an agreement with someone, you would know BEFORE you sign the agreement that you're agreeing to use this decentralized tool as binding mediation method, as part of your agreement. That holds a lot of water in many courts. And furthermore, because this is all opt-in/voluntary, you will get competing decentralized systems architected in different ways. As an example, let's say you have a "free city" somewhere and you want to join it and move in there-- you'd sign onto the method of dispute resolution as a condition on your membership with the free city community.