Seems like a perfectly good idea to me; I doubt one website permitting comparison is going to suddenly instigate a dialogue extremism arms-race (more than normal). In fact if anything it's bringing us closer to the original idea of debate rather than echo chambers.

And it seems like your argument falls under plenty of its own fallacies.

Perfect solution fallacy https://en.wikipedia.org/wiki/Nirvana_fallacy

And some might argue straw-man fallacy given that op never suggested that truth would lie 5050 between the two.

Debate allows us to see two opposing views and draw our own conclusions; not perfect but a whole lot better than nothing.