It takes a lot longer. I reviewed 28 orgs; it would take me a long time to send 28 emails and communicate with potentially 28 people.
This is quite a scalable activity. When I used to do this, I had a spreadsheet to keep track, generated emails from a template, and had very little back and forth—orgs just saw a draft of their section, had a few days to comment, and then I might or might not take their feedback into account.
I remember removing an org entirely because they complained, though in that case they claimed they didn’t have enough time to engage with me (rather than the opposite). It’s also possible there are other cases I have forgotten. To your point, I have no objections to Michael’s “make me overly concerned about being nice” argument which I do think is true.