You're missing the point. The App Store is not a package management system. In Ubuntu, I never, ever install one-off DEBs. Every single piece of software is in

You're missing the point. The App Store is not a package management system. In Ubuntu, I never, ever install one-off DEBs. Every single piece of software is installed through a repo. I'm able to trust that software and I don't let other apps get root privileges unless I grant them and know what's going on. The Apple App Store is not a package management system. It's a store. Developers have to relinquish control and money to have their apps listed there. Thus, many apps must still be installed manually. It's not an open ecosystem and it's not really fair to compare them. Synaptic and trusted repositories saves me from malware because there is no reason not to use them. There are many reasons not to use Apple's.