About Lisa's "dry" hair

I see people continually refer to Lisa's hair as dry and frizzy. I probably would have thought the same 10 years ago, before I started sprouting grays. My gray hairs are the exact same texture as Lisa's hair and they do not respond to blow dryers or flat irons. When they aren't colored you can clearly tell which hairs are causing the problem, but when they are it just looks like you aren't good at styling your hair. My grays are brittle and break off with excessive heat styling, but since I still have most of my brunette hair I still flat iron. Lisa is probably a lot more gray than I am, so she might be avoiding the flat iron because it's really easy to break your gray hairs and she doesn't want to sport a Jamie Lee Curtis look.

You can see the difference in texture between the two types of hair in this picture I stole off the internet, but my gray hair is way more unruly than this: https://50friendly.files.wordpress.com/2013/07/unknown-31.jpeg?w=160&h=159

She could style it a number of different ways to make it look better, but I don't think she has much control over the texture.