A more accurate analogy would be old style overhead drive shafts that powered many machines in large early industrial revolution factories.

This is equivilant to throwing an extra belt over the shift to power your own machine.

There's only so much power available and as more and more machines are driven there's less and less ommph to power more.

This is literally adding "drag" to the overhead power line and decreasing what reaches the end point of transmission.

It's not equivilant to scooping up photons that were being thrown on the ground anyway.