Frameworks change and get in the way when a new version is released. It is most annoying. The underlying WebGL changes much more slowly, and in a much more controlled way with a focus on backward compatibility. So I do the same whenever I can and ignore frameworks to get rid of a dependency. The boilerplate overhead can be encapsulated very well into homemade JS functions that only change when I change them. And JS + WebGL is not really low-level.