You are, of course, absolutely right. I nonetheless think it may have value for some people to understand where the deviations from that simplifying assumption lie, and at least understand the stakes.

Now, I may be biased, because I work in imaging-for-humans, and I've had many a conversations with engineers about why a particular simplification doesn't work for, e.g., filmmakers, but I think that even for purely technical disciplines, understanding the assumptions that go into the pinhole model can be useful. At the margins. Which sometimes matter.