The sun is far brighter than a laser.
While lasers can be incredibly powerful, they focus their energy into a narrow beam. This concentrated energy can be very bright, but it's still far less powerful than the sun's total output.
The sun emits a vast amount of light and energy across a broad spectrum, making it appear much brighter than even the most powerful laser.
Here's a simple way to think about it: Imagine a flashlight and a stadium light. The flashlight can be very bright, but the stadium light illuminates a much larger area with far more power. The sun is like the stadium light, while a laser is like the flashlight.
In summary, the sun's brightness is due to its immense size and the nuclear fusion reactions happening within its core. Lasers, on the other hand, focus their energy, making them appear bright but still far less powerful than the sun.