Because Apple won't allow you to sideload :) >but why won't Apple allow me to sideload if this is secure enough. My observation is that no one would buy a com

Because Apple won't allow you to sideload :) >but why won't Apple allow me to sideload if this is secure enough. My observation is that no one would buy a computer as locked down as iOS, so Apple has been slow walking MacOS into the iOS model, not the other way around. iOS won't become more useful, MacOS will only become less useful over time.