> Why were they using company resources for personal meetings?
Probably because it represents time that are unavailable for work and, in many cases, because their are people at work (including their boss) entitled to know the reason, and who probably established that as the workflow for sharing the information.
Yeah, and that's why you put full details in your personal calendar and into the work one "Doctor's appointment" or something without expanding on that any further.
If I have a doctor's appointment in the middle of the day, I might add it to my personal calendar with full details, but I still need to add an entry to my work calendar to show I'll be out of the office, possibly with a generic title like "Medical Appt".
Probably because it represents time that are unavailable for work and, in many cases, because their are people at work (including their boss) entitled to know the reason, and who probably established that as the workflow for sharing the information.