Apple aren't using that model just for security, but also so they can tightly control the platform and restrict what the device owner can do on it.
apple -> system preferences
security + privacy
General tab
Under "allow apps downloaded from:"
* Anywhere
Why is it ok on mac? Because many computer users are still dependent on non-appstore distributed software. Particularly developers. Nobody has evolved that dependency on ios, so it's not necessary.
It does not require "Click here to get owned" level of work around. I'm perfectly fine with needing to boot into the equivalent of single user mode and entering some security key. But if I want to break the security model on a device I own I should be able to.
> Why is it ok on mac? Because many computer users are still dependent on non-appstore distributed software. Particularly developers. Nobody has evolved that dependency on ios, so it's not necessary.
That is circular reasoning. The "dependency" doesn't exist on iOS because Apple tries very hard to prevent non-appstore distribution being a viable avenue for app developers.
You are misinformed. Right click -> Open instead of double click overrides my current signing requirements and executes the app anyway.