I agree completely.
I also drill a 1/16" hole in the hinge slot to help the CA wick easier and use a T pin to center the hinge while you install them.
All that said. When assembling my Kadet Senior recently the instructions actually asked you to use that slot, along with a piece of card stock inserted in the slot, to align the hinge. That would put the slot inline with the hinge line rather than perpendicular, go figure.
I ignored the instructions and installed them the way I am used to.