Why are you not allowed to overtake now?

Your answer is correct because in German traffic rules, when overtaking a cyclist, you must consider their possible movements. Cyclists can suddenly turn left without prior signaling or may swerve, so you must not overtake if you suspect they might turn left soon. This ensures the cyclist’s safety and avoids collisions. Even if the road ahead seems clear, the potential for the cyclist to turn left means overtaking at that moment is prohibited. This rule helps protect vulnerable road users by encouraging drivers to be cautious and patient.