Since I have low porosity hair...I feel that diffusing allows my hair shaft to open up and I can actually absorb my LI/stylers...Also by diffusing it allows my hair to "set" and provides more "durability" to my wave pattern..I get about 1-2 inch shrinkage with diffusing than if I completely air dry..It also helps to add volume at my crown...So frizz or not.. I get better outcomes in other ways by diffusing...
2b/c CG since 8/12
I have low porosity and fine/med texture. Easily weighed down and VERY frizzy crown, with straighter under layers

Low-poo:TJ TTT, CJ GCS
LI/RO/DC: CK Satin Roots,Sevi Pumpkin, SSI Okra reconstructor, CJ SAC,CJ RM
Stylers: AG Recoil, JC SS
Jellies: CK Coil Jam, Okra gel(HG)
Gel: JC CC, Ouidad H&H gel, Ouidad moisture lock gel

Hair loves moisture protein.
MUST Pixie diffuse.

My hair dose NOT like oils, butters or polyquats Or glycerin in high dews