IMO the term "hallucinogenic" undersells what psychedelics do in some ways. There is an interpretative layer of abstraction that naturally builds up between you and what you are perceiving. This is useful because it lets you make assumptions about and mostly ignore objects that you know are not necessary to pay attention to, and not be overwhelmed by the experience of being actively aware of all their details, but it also prevents us from considering and experiencing what is behind that layer of preconception.

Obviously there's also a lot of other things our brains do that is interpretive or corrective, but it's really remarkable to be able to see the world without that one in particular, which is one of the more striking effects of those drugs, and it happens on doses lower than the ones that produce especially vivid hallucinations.