It's certainly less comprehensive than visiting everyone every time, which obviously means that there has to be more an element of risk. But equally you cannot be sure everything is okay by visiting. To put it bluntly, people with mental problems can, especially over the short term to influence someone, appear well. So whilst it may be right to highlight this, before we light the torches and storm the castle, it would be good to know what criteria they use for not visiting. I imagine such a policy will have had a risk assessment done.
On the other hand, is this policy, or is it an FEO cutting corners to catch up on a backlog of work? Answers on a postcard...