Maybe not reinvent, but you'd damn well better understand how the wheel works or at least be able to deduce it, maybe even be curious about it as an engineering problem. Forget even that somebody's still got to build the wheels of tomorrow (last I checked my car and the car I am likely to buy decades from now still has wheels so I imagine its proper function is still an ongoing engineering issue for somebody), but say you work on a problem and it turns out the root cause of an issue lies in the proverbial wheel - are you going to hem and haw and say that this piece is beneath you? Or are you going to fix the problem?