What if I need an app for work or for a piece of other tech I buy? Please tell how this will have a benefit for the consumer? I honestly get the benefit to consumers but why do consumers want this so badNope, you can chose to only use apps downloaded from the Mac Appstore, if you chose to have it that way, others which like to go somewhere else will have no problem to do so.
Apple could easily implement a setting in iOS, standard would be the Appstore, give a warning if you toggle that setting, for instance, warn users that it might affect security.