To become dystopia people must be forced to use locked down smartphones. In reality you buy the one that suits your needs and do not enforce your design decisions on the smartphones other people use.

Where is that free choice that you see "in reality"? This post is about the opposite of that getting put in place. The actual reality is that almost every service provider is converging on supporting a few extremely restrictive options. From every private service you can think of, to key government services. They all are saying "to interact with us, you must use one of these two types of devices, with all the attestation and security measures intact". It's impossible for people to make their own design decisions or choose for themselves, because other options do not have the corporate/government blessing.

It's ridiculous that you look at all of us being forced into a government-protected duopoly, and then say "Don't you dare force your decisions on us!" to anyone suggesting that this should not be the default. Rules for us, but not them.