Is there any reason to prefer anonymity to protected aliases? I'd say people should be able to post under their nicknames and only their lawyers/notaries/truste

Is there any reason to prefer anonymity to protected aliases? I'd say people should be able to post under their nicknames and only their lawyers/notaries/trustees should be able to disclose their identity in a some lawful procedure. It should not be a responsibility of a platform, but there must be someone who knows the true identity and can certify the relationship between it and the alias.