I understand jailed individuals should have some restrictions to ensure they do not get access to contraband or spend excessive time in visitation instead of se

I understand jailed individuals should have some restrictions to ensure they do not get access to contraband or spend excessive time in visitation instead of serving their sentence, and visitors should comply with those. But why are free people being punished and restricted so much when they choose to interact with people in jail? It isn't like people in jail make enough money to pay for these phone calls, it is friends and family that have to pay the bills. This is even worse when the interactions are with people who have yet to be convicted, and are supposedly presumed innocent in the eyes of the law, it certainly doesn't seem that way.