You are comparing a view library (react) with a full framework (ember). Ofc you are supposed to pull things together with react, that's exactly what's intended.

Compared to react, ember is: slow (1), more difficult to learn (2), has a much smaller community (3) and, most important aspect to me, has a huge footprint (4). (I'm not against ember, it might have some nice aspects and features. It was really nice during the time when they released 1.0. But today I just think their are better options available)

1: https://auth0.com/blog/face-off-virtual-dom-vs-incremental-d... 2: https://guides.emberjs.com/release/ 3: https://github.com/facebook/react vs https://github.com/emberjs/ember.js 4: https://gist.github.com/Restuta/cda69e50a853aa64912d