This is the switch that would normally get pressed in by the white plastic stopper. With the pedal on the floor, it only just touches the tip of the switch, and no longer pushes it in. I can't tell why it no longer pushes the switch in, but it should fully depress it when the clutch pedal hits the floor, even with the master cylinder disconnected from the clutch pedal arm.
EDIT: So, it makes sense to me that if the pedal arm is bent, it would both not fully press the switch and the other end of the pedal arm, when the pedal hits the floor, and also not fully press in the master cylinder.
I can't think of any other reason why the plastic stopper wouldn't press the switch anymore.