Professionalism and quality of bureaucracy vary by country.

In mine, my provider invalidated my SIM twice during their technology upgrades (2G->3G, 3G->4G) without any notice, warning, or hint. Was it an upgrade? Was I phished? It's all left to the user to infer what happened. And if it turns out to be a crime, our rules expect us to interact with an even more apathetic and corrupt police department.

What may look like hyperbole in one country is daily ground reality in another. I'd much rather prefer something under my own control, like TOTP, over anything SIM-based.