Does photography have to pay attention to white balance?

It is not necessary, nor should it, nor should it advocate the accuracy of 100% white balance.

Using the difference of color temperature to express some special scenes can achieve very good results. The most commonly used is the comparison of cold and warm color temperatures. The common techniques used in foreign films are: the background is blue-gray with high color temperature, and the foreground is red-yellow with low color temperature, which has a good effect.