I agree with most of what you're saying. There's a
huge space of possibilities that are completely invisible to the current system. But I disagree weakly with the second to last sentence, and strongly with the last sentence.
The system we have cannot be changed via the methods it allows, however.
Not all at once, that's for sure. But the right small changes early on can lead to very large changes later. Some of those are possible, like voting methods other than first-past-the-post or instant-runoff. Some of them are in the direct control of people who visit HN, like the nature of social networking algorithms, and the metrics chosen to optimize them.
Juvenile pleas for understanding only prolong our misery.
For what it's worth, when I was a teenager, I was far less interested in understanding or compromise. That was about two decades ago. It's only after living in many, many different places as an adult that I think that "understanding" is not only possible, but necessary. My perspective now is anything but juvenile.
When I'm saying we need to bridge the gap between left and right, I'm not saying we need to preserve the status quo exactly as it is. I'm saying that not doing so will practically guarantee that all sides end up worse than the status quo.