Nonsense! That's like saying very few people need dishwashers. Technically true, but at the sacrifice of a profoundly useful tool. For example, the beauty of Algebra is it teaches you to use what you do know to find out what you don't know.
Beyond Geometry. If I could draw a Venn diagram, it would include Algebra in the set called ‘foundationally useful secondary mathematics’.
It’s called “Critical thinking”...which no commie dimwit ever wants the subject of their control to know how to do!