So you mean, Macs and macOS?

All modern devices are appliances, not computers.

They perform the specific functions that they were programmed to perform, and do not allow arbitrary execution of calculations on the underlying hardware.

Many people, mostly folks who adopt the Apple ecosystem, see this as a positive thing that allows them to delegate undifferentiated decisions on security and ways of working to the vendor.

I am one of those people and hope that Android remains open so that people don't expect Apple open up their hardware, which will result in fragmentation.