This is because on the one hand, it is very close to the sun, only/kloc-0.08 million kilometers, and the sunlight on Venus is twice that on the earth. On the other hand, Venus is surrounded by white and yellow clouds, which reflect about 75% of sunlight into space, making it dazzling. Venus can reach -4.4 at its brightest, which is about 10,000 times brighter than the darkest star seen by the naked eye. It can light the way for those who leave early and return late without street lamps.
Of course, the most important thing is that Venus has enough clouds to reflect sunlight.