A trip is more than a series of visual disturbances. It's an emotional rollercoaster. Your perception of yourself and your surroundings changes drastically and you have many insights that you perceive as very significant. This can help take your attention away from irrelevant things and direct it to more meaningful things in your normal life.

And even the hallucinations can show you that we construct our realities in every instant of our lives. You know this already of course but knowing and experiencing are two different things.