Exodus - The Redemption Plan Demands Faith
Physically they are free or moving towards freedom.
Psychologically they are still bound. They don’t know how to stand up for themselves.
Spiritually they are just learning what living in faith truly looks like. Did God bring us out in the wilderness to kill us because there were no graves in Egypt.
Exodus - The Redemption Plan Requires Faith
Marking the houses took great faith. What if this had not happened? Their houses would have been marked for sure death by the Egyptians.