People do care. They might not know it, but they'll immediately recognise a badly designed or badly used font in a UI or magazine or wherever. Why?.. because it

People do care. They might not know it, but they'll immediately recognise a badly designed or badly used font in a UI or magazine or wherever. Why?.. because it effects readability and thus their experience consuming whatever media they're looking at. If someone plastered a inappropriate font all over hackernews you'd notice right away. Good design isn't always noticeable but bad design is frequently the first thing you'll see when you open that new app and fonts are a part of that.