Isn't it smarter for Haye to have a Tune up fight before eyeing the klitschko?

I dont see what the big deal is, haye fought harrison and looked good, tough as nails and did what people thought he would do, it could have been worse, he could have fought down to the competition. Hes the most entertaining fighter in the hw divsion, I mean you CAN'T hate on haye for fighting harrison, esp when tomas adamek fought michel grant? and a un motivated chris arreola.