It is a problem because you'll get thrown out by your hosting and other service providers if you don't moderate your content; so if you want to keep running you

It is a problem because you'll get thrown out by your hosting and other service providers if you don't moderate your content; so if you want to keep running your service, not moderating is simply not a practical option. That is why Parler is mentioned, they are a demonstration that it's not practical to keep operating without accepting a duty to moderate (as Parler did eventually) even if you try really, really hard. And while there are a lot of conspiracies, all of which will be on your site if you don't moderate, most of them will be tolerated by others but it's the ultra right-wing conspiracies / nazis / holocaust deniers that will cause your service threats of disconnection; so you'll either start moderating or get your service killed in order to protect them. I understand you don't want anyone - whether the government, powerful private companies, or biased moderators - to become the arbiters of permitted opinions; however, you don't really get to choose (and neither do I); currently there are de facto arbiters in this world.