That's completely orthogonal though, because Play Store is Google's walled garden. What Google allow you to do, in addition to downloading things from their walled garden, is also side-load apps completely separately from the walled garden.
There's no evidence that the ability to side-load causes an increase in malware/crapware.
Apple is fallible. If developers can break out of app review constraints by using carefully included bugs[1] then the only solution is actively monitoring what the apps are doing. If that's the case, what value-add is Apple's walled garden? Just keeping out crappy programs? I think there are plenty of solutions for discovering what programs are good or not, as we've been working on that problem for decades now for computers specifically, and centuries in the general case.
1: http://www.imore.com/researchers-sneak-malware-app-store-exp...
Computer security is just far too confusing and difficult for the non-tech-savvy. With walled gardens people can delegate their security to someone that, while not perfect, is much better at it than they are. For most people this is a huge win. This is what happens to most peoples' computers if they are "open":
https://c1.staticflickr.com/1/99/259360546_504c726d0b.jpg
If someone has a better idea I'm all ears, but I don't know of one that could match the Apple Store for ease of use. Since user experience trumps everything, app stores are winning.
I'm going to repeat that last part, because I think it's very important. Apple's best interests and my best interests are not always aligned. Why should they have ultimate control over what can and cannot be run on my phone.
But in actuality users don't have much option right more so in iOS.They would use the defaults.
Seriously, stop giving the media so much credit. You can trust the Play store as well as you can trust the App store.
Look at the Google Play store and the Android ecosystem, which is comparatively more open. If you don't know what you're doing and install apps from the app store without examining them closely, you'll get random ads, trackers uploading your geo-location constantly to god-knows-where, etc.