Because designers fuss a lot about nearly undetectable differences in color, fonts, and many other things. Maybe they make a difference in the aggregate. But if you can’t identify the difference between Ariak and Helvetica (to pick a particularly glaring example) you’re probably not one of those designers.

> Then why are the fonts so expensive?

Because they're considered important, and definitely take a long time to make. Try making one.

Market segmentation