If that is the only way you can find out about what is happening to the government responsible for your safety and wellbeing or alerts about impending disasters... absolutely!

Phones are literally essential computing devices in modern society as it is the primary source of important information whether it be about family, government, or national emergencies for a large swath of the population.

Cool, it doesn't matter because US courts disagree with you, even if they did agree with you, there's nothing in the constitution that says the welfare of American society is in jeopardy because Apple sets rules on their own devices that you don't have to buy.

Your argument literally only makes sense if you pretend Android doesn't exist. It is not possible to exhibit monopolistic behavior if you are not a monopoly, and Apple is not a monopoly by any stretch of the definition.