Why blow drying is so common in Japan

Today, and February 6th annually, is Blow‑Drying with a Hair Dryer Day (ドライヤーでブローの日), The anniversary was created by a beauty-tech company with an invested interest. But I have always been intrigued by how many people blow dry their hair in Japan.

I grew up in a country where it is as common to air dry your hair as it is to blow dry it. Personally, I rarely blow dry my hair, but my children blow dry there's every day. There is an old wife's tale in Japan that wet hair gives you a cold. Even though scientifically wet hair can't give you a cold! At first, I thought it was just my mothers-in-law belief, but over time I realized that it seems to be a cultural thing in Japan. And it's not just an unfounded belief that wet hair gives you a cold, but also that wet hair is seen as sloppy and unkempt.

Do you blow dry your hair every day? Did you in your home country? And by and large in your home country do people blow dry or air dry their hair?