This is condescending. Instead of listening to the lived experience that the OP gave you, you’re telling them that they must have been really sick to have to stay for a week.
Going from a 72-hour hold to a 7-day hold is relatively easy, especially in the south where I worked as a crisis responder. All you need is for a doc to recommend the additional days. Judges typically will grant the extension to 7 days with minimal input from hospital staff. Now, 14- and 21-day holds, a judge is usually going to want more. But 7? That was almost always a given if the first 72-hour went through.
Anyway, none of that really matters beyond the technical. What matters is not saying “I’m sorry you felt that way, but you probably deserved it.”