Wow, I’m totally of the opposite viewpoint here. It seems like the whole point of having a calendar is to manage your time more proactively. With so few events, it seems like it would be easier to simply keep track of them in your head instead of opening a calendar at all.
With shared calendars, there is also the benefit that although you know you want to reserve Mon & Fri, other people may not. It could save them time by not sending you a request on those days since they know it won’t be accepted.
Given that you do accept events from the doctor, do put vacations on the calendar, etc., what is the criteria you use to determine whether to put something on your calendar when you get meeting requests?