Yes, because it takes longer to react: Correct
Driving while tired is dangerous because fatigue significantly affects your reaction times, judgment, and concentration. When you’re tired, your brain’s ability to process information slows down, making it harder to react quickly to unexpected situations, such as sudden stops or obstacles. This greatly increases the risk of accidents.
There is no danger, because fatigue relaxes you: This is incorrect. While fatigue may make you feel more relaxed, it actually reduces your alertness and concentration, which is dangerous when driving.
There is no danger because you drive more slowly when tired: This is also incorrect. Driving slowly does not eliminate the risks associated with fatigue. Even at lower speeds, slower reaction times, poor decision-making, and reduced awareness still pose significant dangers.