I've been trying to wrap my head around quantum computing, with mixed success. I have a reasonable understanding of how quantum circuits work and the basic principles. However, there is one big missing piece in my understanding, which I've not been able to fill be googling ...

You can use a tool like qiskit to create a quantum circuit, then send it to a cloud quantum computer. How does this circuit get constructed?

With a digital computer, it would either have to be assembled manually, or simulated. Neither seem practical.

Are quantum circuits assembled by tiny robots? (please say they are!)