Texturizing very curly hair when it is dry is recommended for optimal control and to accurately assess the natural curl pattern, length, and to prevent cutting too much hair due to shrinkage.
When working with very curly hair, which is inherently more fragile and prone to damage due to its structure, texture modification such as texturizing is recommended on dry hair to allow for better control and to accommodate the shrinkage factor that occurs when the hair is wet. The dry hair provides the stylist with the true length and bounce of the curls, which can distort when the hair is hydrated.
This approach helps to prevent cutting too much off due to the shrinkage of wet curls and allows for a precise shaping that compliments the natural curl pattern. Temporary styling methods like temporary waves rely on the breaking and reforming of hydrogen bonds within the hair to maintain the new shape through the drying process, but this does not account for the unique characteristics of very curly hair, whereas texturizing dry hair does.
So, texturizing very curly hair while it is dry grants the stylist optimal control for precise cutting, prevents overcompensation for shrinkage, and respects the natural pattern of the curls.