Lighting a light for the topic sentence

I'm reading the words of economist Paul Samuelson, published in 1965. They please me on a level that I don't quite understand, so I read them again. After a third reading, it begins to dawn on me: it's not the subject matter, it's the construction. Says Professor Samuelson:

One should not read too much into the established theorem. It does not prove that actual competitive markets work well. It does not say that speculation is a good thing or that randomness of price changes would be a good thing. It does not prove that anyone who makes money in speculation is ipso facto deserving of the gain or even that he has accomplished something good for society or for anyone but himself. All or none of these may be true, but that would require a different investigation.

It's a paragraph that stands in tribute to the topic sentence. This bundle of five sentences is telling us: Don't do this. Here's why. Here's why. Here's why. Over and out. Ah yes, the way they could still construct a paragraph in the mid-20th Century. Why am I getting this image of Captain Walker in Mad Max Beyond Thunderdome? Why am I hearing Savannah Nix in the final scene?

Time counts and keeps countin', and we knows now finding the trick of what's been and lost ain't no easy ride. But that's our trek, and we gotta travel it. And there ain't nobody knows where it's gonna lead. Still in all, every night we does the tell, so that we 'member who we was and where we came from. But most of all we 'members the man that finded us, him that came the salvage. And we lights the city, not just for him, but for all of them that are still out there. 'Cause we knows there come a night, when they sees the distant light, and they'll be comin' home.