There is still better security. On Android apps can't start using the microphone or camera while in the background. If an app is using the microphone or camera while in the background the app has to show itself on the notification bar. The notification bar will also have an indicator showing that you are being recorded.
Meanwhile on PureOS you can install a package and then it is free to spy on you all it wants without you even knowing about it.
This is not better security, it is wholesale: android and ios has security, while almost every linux distro lacks any form of meaningful security, which is a huge shame.
