It absolutely is. Defaults matter, most developers just want a GUI for their app that doesn't look like ass. Almost no one wants to mess with styling.

That's why developers have UI/UX and design experts assigned to them. That's why Figma exists. CSS was an attempt to not have to deal with styling. It failed, and landed in the other direction.

> That's why developers have UI/UX and design experts assigned to them.

Not everybody works in big tech.