Everything you wrote has to do with fuse ratings. Why you are bringing up fuse ratings, when the topic was different amplifier topologies react differently at a given impedance (so you cant generalize any specific impedance as sound bad), I have no idea. Nor do I know what "So, 2 ohms is obviously further from being a giant fuse than 1 ohm" means.
SoundStream use to advertise their "high current" amps rated power below 1ohm. Not really sure what that proves, however.