EMULATE APP STORE FROM ANY LAPTOP ON WIFI TO INJECT ANY UNJAILBROKEN IPHONE WITH CUSTOM APPS

Ok evil and misleading this title is I know. But why couldn't this be done? Why hasn't anyone created or come up with this idea yet?

Ok how I hear you ask? In theory I believe it is possible if someone a lot cleverer than me could do what was needed. Everything these days is done with security certificates, protocals and so on, why couldn't someone clever analyse the iphones firmware and look at all the things needed for the iPhone to think its in touch with apple, then once the neccesery information has been gained compile an app store of their own that you would run on your laptop/router and insert into it any custom apps of your choice so that when you connect to the same wifi point and click app stor on your iPhone you would be communicating with the one you created but the iPhone would think its talking to apple???