Why can't you pat the Buddha's face?

There is no such statement, and if there is, it is not an orthodox statement in Buddhism. The Buddha statue is awe-inspiring When we see the Buddha statue, we will feel respectful and sincere, and the solemnity of the Buddha statue is mainly reflected in the face. Taking pictures allows you to have time to see the Buddha statue, showing respect and showing respect to others. Your merits are boundless.