The Secret to the Hardwood Floor Demolition

About week 2, I was wandering around the site in the gorgeous CA evening light, and I noticed very slight saw marks in several portions of the subfloor. Putting some rebar next to them so they would be obvious in a photo, I photographed these and will post them to the site later. Why? Because on day 2 of the j0b, foreman A. told me that he couldn't easily save the sidenailed hardwood b/c of the difficulty of it's removal. But in the photographs of that day, there are several large pieces, none of which showed up in the "saved" pile of the hardwood. And when I saw those residual parallel saw marks, obviously an overcalculation of the blade height of a saw, and b/c the marks track perpendicularly to the direction the flooring had been laid, it occurred to me that w/ Luca not onsite that day to supervise, the marks may very likely be a result of cutting across the hardwood to faciliate it's removal. If so, why didn't A. just tell me?