I’m a sample size of one but I suspect that most folks don’t see many negatives to the walled garden. I don’t want to hack about on my phone. I don’t need root nor do I want to worry about security on my phone. I don’t think Apple is perfect or impervious to attack vectors but for me. I actively prefer the walled garden. It’s mostly something I don’t have to worry about.
Once I change to a laptop then I’ll shoulder the additional risk and work to have a more open platform.