On-Site reporting is fresh more accurate reporting
Most home inspectors do the Inspection report some time later in the evening, or up to days later, they have to rely on hand written or recorded notes. That inspector may do as many as two other inspections in that day. Information from homes inspected that day tend to blend in an inspectors thoughts when creating the individual reports. Much of the time an inspector is staying up late into the night to do their reports. You then have a tired inspector doing your inspection the next day. On-Site reporting with fresh insight is the most accurate reporting that can be done. I have seen Inspection reports that report on items that do not even exist in the home inspected. Likely that item did not get reported on another house inspected that day by the inspector.