This is a brilliant insight and is very much the case. One would think in the medical setting there would be a very intense oversight and personal scrupulousness even in carrying out routine duties because they often involve necessary steps for care and any neglect through errors could have disastrous consequences. For example, giving the wrong medication to a patient who is in the same room but in a different bed is a classic known to hospital care and still happens in institutions despite more and more sophisticated safeguards to ensure accurate patient identification for all such procedures.
This can be arranged through spirit meddler manipulation of the caregiver to have a lapse in judgment or memory, a moment of confusion or fogging the mind to simply skip over a step or be distracted in a way that causes this to happen and then an error is made without the person realizing it. This is the largest factor in the cause of errors in professional settings, where the errors will have significant consequences before they are caught and changes made, if that is even possible. So the aggregate consequences of this meddler mischief are enormous because it contributes materially to making the U.S. Health Care System the leading cause of death in the United States of America, and this is mirrored all around the world where Western Health Care is practiced.