"Oh, right, so tell us the names of the seven others whose password shares we need?", then proceeds to arrest and beat at least five of those seven others.
The other seven people would be known only by their public key, and you'd make contact with them through some onion-routed service. You'd never see their face, and all you'd know is that they were based in a different jurisdiction, where presumably the authorities that are after you don't have strong judicial connections.
If your threat model includes an adversary that is willing and able to kidnap and torture 5 innocent people from different countries around the world in order to get to you, then you're literally OBL or the leader of IS, in which case you have bigger problems than securing your passwords.
If you don’t think this is realistic then perhaps you don’t have a home security system with alarm monitoring. It has a distress code that disarms the system so any attacker believes it is safe but instead simultaneously sends a hostage alert to the local police station. It works well because once I accidentally tested it by accidentally putting in my distress code when I had traveled for 48 hours and was extremely tired. 3 mins later local police had silently approached my home and were looking in the windows with guns drawn.