Great, go ahead use your email address rather than a phone number then! If the author's point had been that there should be a non-SMS option, I would not have

Great, go ahead use your email address rather than a phone number then! If the author's point had been that there should be a non-SMS option, I would not have commented. But that wasn't their point. They thought it should be removed as an option from everyone. It's just an amateurish idea, completely ignoring the real world and the tradeoffs.