This kind of mentality is why malware became such a big issue on Windows. It turned out ignoring security and just relying on the user to not be stupid doesn't work. That mistake shouldn't be made again and there is no reason to artificially restrict the audience of an OS to people who don't have "low IQ."
No, the goal is to move to a system that doesn't rely on badness enumeration (antivirus) as a primary defense. You can rely on the app sandbox and the security model of the system to keep it in check.
Antivirus scanners are essentially useless on modern mobile OSes because they are limited to accessing the same things a malicious app or file would be.
