The thing is, we're actually pretty crappy at knowing what we'll need 50 years from now, much less 500. Doesn't make sense to overbuild for an unknown future, when hundred years from now us will likely be able to do a far better job anyway.
What's covered in the article is also a great example of material resource that could be used, but short term profiting primes.
In which case you spent a bunch more than you needed to on a building that didn't last any longer than it would have if you'd chosen a practical end date for it.