That there are two aspects to every difficulty is certainly pertinent. Neither side may be discarded in favor of the other. Paul speaks of being cleansed from every pollution of flesh and spirit . That statement indicates that sin has a double face. Sin has corrupted both body and spirit.
Man is totally depraved.
However, since it is corrupted it leads astray, and allows the body to do what it should not. It needs to be purified so that the Christian thinks and reasons and wills according to the Scriptures. The body too often takes the lead. It too has problems. By that Paul means the body has become habituated to sin.