Well, the _plan_ is to remove all that stuff. I'm not so sure in practice this is done. Lowest bidder and all. If they remove everything down to the steel, and then sandblast every inch, then I'd agree, but I sincerely doubt they are that meticulous in practice.
When I see people use the words ALL, always, never, etc, my bullshit meter goes off the chart. I have rarely seen absolute statements be accurate, especially when there is no financial gain as an end result.