You can however not invest very much on the apple ecosystem and subscribe to most services outside the app store mode, which is what I do myself, but I'm a minority.
But I buy Apple. For myself, my parents, and I recommend to relatives etc. The tight leash is a feature not a limitation. I know if I set up an iPhone or iPad for my mum the apps aren't going to try charging her credit card or installing bloatware and so on.
The tight integration between all the services is a plus as well - something I just don't trust on other devices. Using the parent example again, my mum doesn't need to understand iCloud syncing, she just knows that all her photos are safe on the device and will show up on the computer.
We can go two ways with this:
1. We teach users how to use computers so they don't hurt themselves. Some still will, because they don't get it.
2. We clamp down on all uses of computers so that they're safe for uneducated users to use. Only authorised corporate programmers are allowed to create applications. Users are "safe", but treated badly by their corporate overlords.
I want scenario 1 (with no sandbox and the freedom to install whatever I like). Scenario 2 is where Apple is headed.