> -dispatch costs are high because policy choices have created a physical reality that drives high constraints.

You don't seem to understand what's driving the so-called re-dispatch costs in Germany so let me explain: when there's power consumption in the South, it is paid at the market price, when the "supplier" is located in the North (typically wind) and there's not enough network capacity to transfer the power to the consumer, the transport authority sends an order to the supplier not to produce the electricity, and instead pays a thermal power plant in the South (at a higher price than market price, by definition) to provide it instead.

That's not a problem of physical realities driving constraints, that's the problem of a market that uses a very simplified model that simply can't deal with the complexity of the underlying phenomenon (we don't even have enough computing power to accurately model the electricity transport at national scale given how challenging the equations are, and even the lineralized version that are being used in practice are already very compute-intensive, it's entirely futile to expect to build a market that can efficiently reflect them).