FYI, that afro was achieved by blowing the curls out! I have to have my hair blown out in order to achieve that 70s look, otherwise, I have ringlets and curls
I've seen plenty of women with natural afros and no need to blow dry to get that look. Some women have tighter curls or coils and the hair grows more dense that's all.
Are you saying these people had to blow dry their hair to get an afro?
A person with 3a, 3b, 3c or 4a hair texture probably does, such as this young man
But it is quite possible for a person to have natural afro and just pick it out and shape, without the use of a blow dryer.