I'm not sure I see condescension here.
Everyone does deserve access to built-in, high-quality tools. And everyone already gets that, with all major browsers. No one is taking away the built in developer tools in Firefox, Chrome, IE, Safari, or Opera. The problem is that they're always just a little bit older than the tip of the current development branch. And that's fine for folks who are starting to teach themselves how to debug web applications. Hell, that's fine for most people, developers included.
But there's a lot of development happening in this space, and sometimes you need access to tools or features that aren't yet stable enough for wide release. So you download Firefox Nightly or Chrome Canary. And you flip on something in about:config or enable experimental web platform features in chrome://flags. And you're off to the races.
That's not dividing the web, and it's not giving different tools to developers versus users. It's trading stability for slightly faster access to new, shiny things.