Earlier quoted context omitted.
The problem isn't the size, the problem is that it adds features which are outside the scope of 'a Browser'.
WebRTC is now a web standard and ships in multiple browsers. If you consider such technology to be outside the scope of a browser, then you're going to need to convince a whole lot of people.
The comments in this thread are going in loops.
"Hello shouldn't be bundled with a browser."
"But it is just a small wrapper around WebRTC."
"Yeah, but it's out of scope for the browser."
"WebRTC is a web-standard"