All your examples involve visuals though. Given our visual system is such a critical part of how we experience and interpret the world, I wouldn't say focusing

All your examples involve visuals though. Given our visual system is such a critical part of how we experience and interpret the world, I wouldn't say focusing on the visuals is "hugely underselling" hallucinogens. Your last point - complete disassociation from normal reality - is a hallmark of all hallucinogens, in my experience.