iOS isn't a developer's platform and if it were, developers probably wouldn't be interested in it very much, since what developers want more than any API, tool or system is users.
Not that they couldn't focus on users better, or couldn't support developers better w/o impacting users negatively. They could and should, IMO.
Apple has pretty much fixed the issue this post is concerned with (very slow app review process)... but it took several years -- checking the internet, it looks like ~2016 was the general turning point, so around 7 years after this post. It shows just how little the developer experience matters to developers if you have users.