Yes this can be true blow drying can damage your hair. But so can the wind and dirt in the air!
However, there are things we can do to make it better.
1. Let hair dry a little before you start.
2. Use a protective product on the hair
3. Use the cool bottom every few seconds to cool the dryer down
4. Use a ceramic dryer.
5. Try not to stretching the hair so much. Comb the tangles out first. Dry 90% before you start to use the brush. Most of your styling can be done with your fingers alone.
Summer is near. When you are out in the sun put sunblock in your hair! YES sunblock, it will protect it from damage.