I'm sure many have opinions about this subject of bending kiln dried wood or in my case not bending it. From my experience, I would never put myself through the misery of getting kiln dried wood to bend. I say this because I have tried. The issue is the moisture content of the wood. In air dried wood, you generally get anywhere from 15%-22% moisture content in the wood. This saves time in the bending process. I will not bore you with the technicalities. In kiln dried wood, you generally get less than 10%.
The less moisture in the wood, the harder it is to bend. The water helps to conduct heat transfer, hence the steaming. The steaming provides the heat not so much the moisture. I do other things to "saturate"the wood prior to bending.
With so much preparation that goes into the preprocess of bending, I prefer air dried wood to kiln dried wood. Yes, you can bend kiln dried wood. Then again, you can bend any kind of wood with persistence, time and money.