I understand that, I'm saying especially in young kids, telling them to just stride as far as they can leads to reaching, leaking, swinging, and disconnect. And in most cases they won't stabilize their landing and they'll spin off their foot or never be able to get their head over their front leg. The reaching causes a disconnect in the two halves and they can't work together.
If a kid can stride 100% of his height and stabilize his landing, great. But in most cases, there is some leaking from that front knee, and a cue of more force into the ground might 1) help them keep better tension in the lower half, and in turn 2) allow them to get over their front foot at ball release, because of a more efficient stride.