Why does israel even have "detained" women and children?

So, in the 20-point plan published by the white house, point 5 mentions releasing 1700 Gazans "detained" by israel after Oct 7, 2023, including all women and children "detained" in that context.

(4) The White House on X: "President Donald J. Trump’s Comprehensive Plan to End the Gaza Conflict" / X

How are those women and children not hostages?

As of Oct 2025, israel holds 3544 administrative detainees without charge. There are 360 children and 49 women "detained".

Those numbers are from Israel Prison Services and don't include "detainees" in army-run camps.