When I am watching Netflix or YouTube and the such and I want to adjust the volume, I don't have to use the mechanical buttons on the side, I can tap the screen and slide the volume up or down. Why then, isn't there a option in the settings for "display Siri icon" so I can just tap the icon, not hold down the home button? This would make so much sense. My family has had/have 6 iPhones...two have had home button issues. They work, just annoyingly not all the time. The less you use a mechanical button the longer it will last. (I think, lol)...as I said, it should at least be an option. Any thoughts?