This is a really good point... particularly with React Semantic UI [1] and Material UI [2] having tons of existing components, as well as pretty nice developer experiences.
[1] https://react.semantic-ui.com/introduction [2] https://material-ui.com
[1] https://react.semantic-ui.com/introduction [2] https://material-ui.com
[1] https://github.com/ant-design/ant-design [2] https://github.com/grommet/grommet