It is reaching. The film makes a clear distinction when after a round of fighting Cap is fine and Window is exhausted, panting. He's superhuman, she's not, she's just really good, which is part of what makes her awesome. "This is nothing we've ever trained for."
Reaching to make "pulled apart and disassembled" into a physical line is reaching. Did they take off her arms? When you try to take these lines written for what everyone making and connected with the film agrees with is a non-powered character - when you try to take that and make it more than was intended, you end up with more questions than answers, and they're not particularly interesting questions.
And lets get to the heart of it: The reason BW has the SSS in the comics is to connect her to the Cold War, to avoid a retcon since she was involved in so many stories surrounding that era, as well as leave room to connect her to the most interesting part of Russia's Intelligence Community history, and cement her ungodly skills. This, long story short, just isn't necessary in the films, on any level. The films establish she's been training since she was little and killed a lot of people. That not only makes her an incredibly interesting character, but puts her on the tail end of the Cold War, as well as the fallout between Russian states afterwards.
So what does giving her super powers actually do for the character? How does it make her better? How does it prevent her from seeming like a knockoff Captain America, so much the worse since she's already shown she can contribute and keep up even though she can't do the things he does, and gets tired just from fighting aliens.