Just for the record, here's a pic of my hair. I did pick it out a little bit, but that did not change the texture, only made it a more even looking puff. Had I done nothing, it would look the same, just a little more compact and crooked. It is also pictured upthread, in twists.
And regarding the crochet hook, they were using it as a guide for circumference, which is a huge factor in hair-typing. You can't just say crochet hook, and expect everyone to know which size, you know? When you say pen-spring, or straw those are pretty standard. But crochet hook is not. I think this a key point, so, it's not really over-thinking.
Any old way, I have some pen-spring coil, no definition-even-with-product, kinky, motherland, super-shrinking, gravity-mocking, true afro hair.