I don't think you understood the described problem with storing the time in UTC. In the example in the article it is assumed and your software gets the timezone

I don't think you understood the described problem with storing the time in UTC. In the example in the article it is assumed and your software gets the timezone update. But because the meeting is stored in UTC, it displays the wrong time. The reason it works for you is because you schedule in UTC. That's great, but for people that don't schedule meetings in UTC, you are vulnerable to the problem described if you just save the time in UTC. Do you schedule meetings with your dentist in UTC too? I'd wager that most meetings are not scheduled in UTC.