I would agree that this is an unfair fight for Silva. He's clearly too old to be boxing and he was never a great boxer to begin with. Watching his boxing matches, he almost never defends himself and relies on throwing haymakers at unskilled opponents. This should be an easy win for Jake despite what people will try to bill this as. MMA, Silver wins easily. Boxing, I think he's a huge underdog. His skills are less polished than Jake's, he's old as hell, and he hasn't been training like Jake has. He's throwing his reputation to the wolves for a paycheck. I hope it's a big one for him.
While Silva can throw hands, this doesn't mean that he's a good boxer. I agree that the dude almost always forgets defending himself and leaves his face open for a punch. He has some hits on him but without a decent defense I wouldn't think he can outlast Jake which is a lot younger and is training consistently. Silva is an MMA beast, but on boxing he's just average at best. He's in this for the money obviously, as all the other fighters who squared with Jake before.