But there could be a switch to allow installing apps from untrusted sources" default off. It's sad that people are so ignorant and gave apple so much power. :(
I think you're over-generalizing. Most people with an iPhone do not care about side-loading apps. They may be ignorant, but they also do not care. The same reason I am ignorant about the rules of NBA, or Cricket - I simply do not care.
The power you're talking about (and the risk you're not talking about) are of no value to me.
The power you're talking about (and the risk you're not talking about) are of no value to me.