Read guān for looking and outlook: 参观 (to visit), 观众 (audience), 观点 (viewpoint), 乐观 (optimistic). As a suffix it means view or outlook, as in 世界观. A second reading guàn is used only for a Daoist temple, as in 道观.
见 is the indexing see-radical, a person with an eye above, and carries the whole meaning: 观 is looking with intent, observing or contemplating. It pairs with 视, 觉, and 览. The simplification kept 见 because seeing is the core act.
又 on the left is the modern simplified replacement for the traditional 雚 heron phonetic in 觀. The reform swapped a tall bird graph for the simple hand shape purely to cut strokes, so it carries no etymology here, just a marker that distinguishes 观 from 见.
