I’ve seen pictures of people from the past with my hair type, from the time before conditioner. I will buy conditioner. Styling goops too. Do you mean everyone should cut their hair so short it doesn’t matter? I like having styled hair - will agree it’s culture/marketing but so what?

I could use shampoo as body wash, sure, not so different. I don’t use natural soaps because in hard water they do more harm than good. Conditioner is a non negotiable. Sometimes I just rinse and condition, but never wash without conditioner-ing.

My husband keeps his hair very short but that involves haircut every two weeks, it’s not cheaper overall.