Yes, combing is good for the hair and scalp if done properly. Gentle combing helps improve blood circulation on the scalp and keeps the hair manageable. But combing too aggressively or too often can increase hair fall and breakage.
Wet hair should always be combed carefully because it becomes weaker at that time. Many people prefer wooden combs because they reduce static and feel softer on the scalp.
If someone has oily hair, regular combing can help distribute natural oils evenly. The main thing is not to overdo it. Constantly combing or touching the hair actually causes more damage than benefit.