The lower the control over the apps in the store, the lower the security: The Android apps store has far less "Moderation" and review than Apple's - a good part of the reason for the surge (>400%) in Android malware, and a good reason not to "jailbreak" your phone.
You can have one or the other... I'd prefer that anything I put on my computer is bug free, spyware free and clean of apps which might steal my identity or direct me to a site which will...
What you find on this site is clean, and meets Moderation's standards...including walls, blinds, etc.
What you find in the store is 100% clean, and guarded. Your credit information is not stored.
Therefore people don't pick up malware/viruses, etc. here.