I don't understand your point of view at all. Gerrit has such a good work flow and ui. It's probably in the top 5 best tools I have ever used. Github's pull request model is like a child's toy in comparison.
I've basically given up on fighting with the WMF's Gerrit install and outsource the work to other people. I push a commit up to a github repository, open a task, and ask another developer to grab my commit from a new git remote. I want to write code, not wrangle with whatever Gerrit wants me to do to submit code. And then look for tiny links on a cluttered page. No thanks.