I do get the point, but simply preserving the local time isn't the right answer. I'd argue that when you change your local timezone offset, then your future schedule is indeterminate and all events have to be reverified. What if the event is for an international flight -- is it still leaving or arriving at the same local time? How about that standing 9AM meeting -- is at 9 because of the corporate office in a different time zone calls in, so your local time breaks their calendar?
What he's getting at is that timezone rules change, so the function to go from local to UTC when you save the meeting is not the same as the function to go from UTC back to local at the time of the meeting.