Earlier quoted context omitted.
> What problems does it cause to make the locked down experience the default with the option for me to disable that and take control of the device after I buy it? Facebook will demand you use FacebookStore, which will NOT force apps transparency. THAT is the issue!
And you'd still have the choice to install it or not. Android still allows their users to sideload apps, and it hasn't been the apocalypse. The core idea is choice.
"Not being the apocalypse" is a pretty low bar. Is it not the case that Android has a much worse history of problems with third-party software, including security, privacy, battery life, etc.?