Earlier quoted context omitted.
That's a good summary. My years suggest that he wasn't nearly pessimistic enough.
You mean if you add 9 women you get a baby in 81 months?
Now, you might say, "I will just bench those other 27 people" and have them play cards or something. In most organizations, though, you cannot do this. Instead, they must be seen to be useful somehow. And if you have 30 people with their hands in a three-person project, no matter how peripherally, failure is all but guaranteed.
I have seen this many times.