I don't know it in the way that I know about gravity or garbage collection. But I know it in the sense that the end results of this complex system are at best subject to debate as a net win given metrics that include the environment and equitability. A system with the set of pros and cons that the current one demonstrates on a daily basis seems incredibly unlikely to me to be remotely close to optimal.

Now, what does seem true is that it is easy to tell stories about this system that focus on its pros, of which there are many, and thus to construct the overall impression that we should be cautious about changing or discarding it.

In and of itself, that's not a problem. However, combined with the fact stories about the cons are routinely marginalized, discarded as not serious, simply ignored and forth, this is a problem. It leads to a strong bias in favor of the status quo - look at the all the good things we get! we must careful not to lose them! - and an equally strong bias against change attempting to target the much, much less culturally visible cons.

When I see a system that combines externalities, wild inequality of outcome and this sort of builtin restistance to tackling the cons, my facile knee jerk reaction is to assume that it is rigged. More pertinently, even if the alternatives do present various risks, we should be exploring "the neighborhood" with an awareness that we may not even be in a local optimum, let alone a global one.