My point was that the hot blower is going to turn some portion of that water into steam. The blower (at least my Eaton) is well over 100*C after driving for a while, and the output temps of the blower are in the 200*C range.
Further, it has to travel further before it gets to the combustion chamber.
So, to ensure that you still have some liquid water, you need to inject more water then you would if you were injecting post blower.
The point of injecting pre-blower (at least for me) is to help cool the blower and prevent heat soak in the blower.
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