You seem to be deliberately misunderstanding me, so I don't know what to tell you. Again, I tried to help explain it to you, but you are refusing to acknowledge that people really do store events as future datetimes attached to a timezone, not just as local times, and I don't know why you continue to insist otherwise.
Good luck.
I did not insist people do not store future datetimes with offsets. I wondered if it's a mistake. People who store future datetimes with tz obviously have to parse all of them and would need performance, but my opening statement was questioning when this is actually necessary, as it looked rare to me.
RFC 5545 introduces floating time to -- I assume -- avoid this silliness, so that your lunch is actually forced to be rendered at 12 regardless of tz.