When there are numerous alternatives to GitHub why would I continue to use them? Clearly they were not putting the time and effort in to both train their employ

When there are numerous alternatives to GitHub why would I continue to use them? Clearly they were not putting the time and effort in to both train their employee and review the content (simply reading the sentence would give context), why bother dealing with them? Also why as a code hosting service would they be getting involved with the politics of the content of projects they host?