Are you kidding me right now, yes? Are you related to samsung company devs or marketing team? You all have very big problem, if you cannot see clear very BIG down-sides of your proposed "solution", which is not solution but poorly designed workaround.
At first you loose lot of elasticy and fluid use of android system. If you configure "Do not disturb" for use just as you said in your post (DND on, sounds turn ON) it becoming useless for any other task. Then you cannot quickly unmute or mute (egzemple for notifications not appear completly) totally apps by two-clicks only you need to enter DND menu everytime and changing this, UGH. Second, it is convenient to quickly mute phone on meeting, when it lies in our pocket without needing even to look at it. Last but not least, using DND is totally unintuitive for most users. Most users use case cover buttons for changing sound settings and not DND function, guess why - becouse these buttons was designed mainly for that! A lot of users use just that, just for convenience of use physical buttons. In fact, all user are used to it and as I see here not only I cannot understand Samsung (rather whole android) riddiculous approach. This forum topic is two years old. This problem is as old as android. Just sacrificy 5 minutes in google/bing and you will find hundreds of pages covering this problem. Yes this is problem, still not solved by samsung/android (poor workaround doesn't count). If I think for implementing this, from programmistic perspective it also should not be a big problem (it works on iOS). Please just do something about it, notify your highiest supervisors, give this problem high priority. I really want to have option to let emergency calls with sound for specific contacts. because of that I and a lot of other people going to move to iOS phones. Sadly, because i also prefer Samsung android, but safety is highiest priority. Just do it and stop naming workarounds as solutions.
