Is it bad to use damage hair products when your hair is healthy?

My cousins hair is really healthy. She has never blow dried her hair and maybe has straighten it three to four times in her life. But she is obsess about her hair. Shes constantly saying that her hair is damage and that she has a lot of split ends when really she probably has like one or two split ends in her hair that you cant even see. Shes always wanting to cut her hair short because she says her hair has split ends. And for once in her life i would like to see her beautiful curly hair long. Unless someone is inspecting her hair you can see them. your lucky if you find four split ends. So she uses products for damage hair my only question is if that is bad for her to use that when her hair is super healthy?

Is it bad to use damage hair products when your hair is healthy?

I hate to say it but, hair damage products are the same as any other kind of product. The honest truth is it's her diet that makes her hair that way. The shampoo get's washed off each time she washes her hair it's only temporary......Honestly the woman could use horse shampoo and it wouldn't make a difference. But about the split ends tell her she's just spazzing over nothing.