GitHub Actions aren't focused on CI, so they are much more useful.
Compared to what? ie.. Jenkins, CircleCI, Gitlab's CI/CD...none of them are "focused on CI", and can more or less do anything you want them to. I'm not trying to be argumentative, but I'm having trouble thinking of a CI/CD system that is more(or less) focused on CI than Github actions is - do you have some examples?