Why is it dangerous to drive with a dirty windshield and damaged wiper blades during sunset or sunrise?

1. Low sun glare scatters light across dust, dirt, and wiper streaks, causing blinding glare and complete loss of forward vision
2. A dirty windscreen tints the glass and therefore reduces dangerous glare
3. Worn wipers matter only in rain, and rain is rare at sunrise
4. The problem is limited to the driver's comfort and does not affect stopping distance