But what can happen is people using the wrong products for their type start complaining and the products get reformulated for less curly hair
Does this happen (genuine question)? If I bought a hair product and it was too heavy for my hair, I'd just think 'not the right product for my hair' - I wouldn't complain; and I wouldn't expect manufacturers to change a product because it didn't suit one hair type.
There are infinite variations of hair type, within the broad spectrums of fine/coarse/straight/curly/dry/greasy/different racial hair types. Unless you have the money to get someone to formulate something for your exact hair, you'd expect to shop around and have some successes and some duds, surely?