Reversing and binary patching are two different but related arcane arts. Reversing is the understanding, patching is the modification. Many people do both, but just understanding one doesn't mean you can understand the other. When it comes right down to it, binary patching can be done in a million different ways, regardless of how the reversing was done, and it doesn't get nearly the respect it deserves. Most people tend to lump reversing and all related (binary patching, anti-anti-debugging magic, etc) arts together, but they all deserve separate discussions and explanations.

(Sorry for the extremely long winded, slightly off-topic reply.)