Although it may be technically incorrect, it is the best way to explain it.

The electrons push their way into the load and back to the source, which is grounded.

These electrons want to go to ground and will take the easiest path.

If the designed path is not available for them due to a broken wire/open connection, they look for another way out, like someone touching the washer and dryer at the same time and they will take that path at the speed of light.