You are speaking as someone who hasn't suffered from addiction. If you are an addict, you want drugs and you'll avoid withdrawl at all costs.

> Whatever the facility, I'd have medical staff monitoring my symptoms

You get the bare minimum in jail.

> The last thing I would want is to spend a night in jail then released for time served, wander back to my crank den, where after getting more crank into my veins

If you were an addict, that's exactly what you would want.