The benefits of being able to adjust the temperature of a dog hair dryer include:

1. **Comfort**: Adjusting the temperature ensures that the hot air produced by the hair dryer is suitable for the dog's skin, avoiding discomfort or burns caused by overheating.

2. **Adaptation to Different Seasons**: In winter, warmer temperatures can be used to help dogs dry quickly after bathing and prevent them from getting cold. In summer, cooler temperatures can be chosen to avoid adding unnecessary heat to the dog.

3. **Hair Protection**: Proper temperature can help protect the dog's hair, preventing damage to the hair texture from overheating and maintaining the health and shine of the coat.

4. **Quick Drying**: Adjusting the temperature allows the hair dryer to quickly dry the dog's coat at the appropriate temperature and airflow, saving time and reducing the dog's waiting time.

Overall, by adjusting the temperature, a dog hair dryer can better meet the needs of dogs after bathing, ensuring their comfort and health.