You'd think, but it's a lot harder than it looks, and I'm speaking from experience.
In the meantime, they're going back to a solution that they know works, because in this case it's literally what they used to do before and what they already do for all other residents, and it has a lower failure rate.
All they're doing here is reverting a failed experiment in response to the measurable, documented problems it introduced.
> a solution that they know works
For what definition of works? My (thankfully few) trips to the hospital have not exactly inspired a lot of confidence in the hospital system. Duplicated questions, minimized interaction with an actual doctor, being kept in the dark about what's going on, waiting for hours between human interactions, empty IV bags which hang for hours... This is questionable definition of "works".