The polarizer is only one type of sunglasses. The polarizer can reduce the reflection; it can be worn when driving, fishing, skiing, water skiing or cycling, which can improve the clarity of the field of view. For patients after cataract surgery and for those who are sensitive to light, choosing polarized sunglasses can also improve visual comfort.
However, polarizers also have limitations: for example, wearing polarized glasses may not be able to see the LED display, GPS and mobile phone screens. Therefore, polarized sunglasses cannot be used for pilots, crew, etc.
Therefore, each type of sunglasses is only applicable in different fields. You should choose according to your actual needs, and you cannot simply distinguish between “good and bad”.