That split system is how it works where I live. Obviously it's quite difficult to have competition for the infrastructure. So I can choose who delivers power (well, I mean it comes from the same grid. But different companies buying power from the same spot market charge you different amounts 🤷) but the infrastructure is a monopoly. Not only do we pay a fixed fee for the infrastructure, but also a transfer fee (and taxes, and also taxes on the taxes)

So in the end I pay more for the infrastructure part than the power consumption.