There is a misunderstanding. I’m referring to the theory exposed here
quickbeam1213 - Is it true the girth gains hinder length gains?
The reason why it is flawed is that is supposing that girth gains are due to gains in thickness, where this is not true; tunica is very thin, girth gains are due to a longer circular tunica, so CC can expand more. Although some increase in thickness is probably happening, this won’t make much of a difference, per se, even less when considered that when stretching you are pulling the axial tunica not the circualr tunica, and the penis is flaccid, so void of blood.