Privacy is required for secrecy, but secrecy may not (per the upthread distinction) always come along with for privacy. (Though I think the second part is dubious; yes, you have an idea of what I might be doing in the bathroom, but you don't actually know and moreover you don't know exactly what I look like doing it, and that is because privacy always requires some measure of secrecy.)

> Secrets do not hinder transparency.

Sure, they do. Secrets on matters that aren't the subject of concern don't hinder transparency on the subject of concern, but that's not because secrets don't hurt transparency but because the specific secrets at issue are outside of the area where you are looking for transparency.