I think you need to get out more.
Look at you all "available option" now. I would bet that you have never opened up a deck gun for a quick attack. How much water is wasted opening and closing the valve? You're acting like you are calculating fuel mileage for Dale Earnhardt Jr. I have trained on Blitz tactics and used it once, then we found out that the hydrant we were set to use was busted.
He is saying that using a Blitz can make for a lot of wasted water. First, the water that slops as you are getting the pressure right. Secondly, the water you waste getting the stream on target.
We no longer use it because by the time one engineer is ready to open it up, the two FF's and Captain are in place with hoselines ready to go.
He is saying that a proficient firefighting team can rapidly and efficiently extend a hose line and be ready to go pretty damn quickly.
Think of it like this.. It's like asking your date if she's on birth control after you've emptied your sack into.....well, you get the picture?
Basically once you shoot your load you can't call it back and use it in another way.