>> This really feels like I made some blanket statement than offended your sensibilities so you decided to argue without knowing why, if I'm being honest.

Because you said this:

"An ebook has zero cost of distribution and no middlemen."

and then said this:

"These are all fixed costs not per-unit costs."

Which are two different arguments.

This really feels like you made two different arguments, then I offended your sensibilities by pointing it out, so you decided to argue without knowing why, if I'm being honest.