Is it not? Your entire post only argues "It is, but here's why it works for me...". Removing the "freedom to tinker" is taking two steps back from what a computer should be. And smartphones are growing to be the primary computing device for many, so in my mind it's ridiculous to argue them being locked-down a merit. Relying on apps from a walled-garden app store is not a solution even if it works for you or others. Many legitimate apps are banned from the Apple app store entirely, and users cannot install them even if they choose to because iOS prevents installs outside of the app store (unlike Android). I want to run my own code on my own device, freedom to do so is not "hugely overrated".
And as for privacy: what is privacy if its decided for the user and not the other way round? You cannot have true privacy without freedom, you only have Apple's definition of it. Tell Chinese Apple users about privacy, why Apple stores data in China.
And freedom extends to hardware, too. You purchase an iPhone and Apple tells you it's too dangerous for users to fix it themselves, and lobbies against right-to-repair [1]. Do you also consider freedom to repair your own devices overrated?