It's more about the situation where you want to have your own echo chamber and move across clients. You're not doing that with your normal account right now becaus you have your relay set which will follow you around any client. Basically wide open all the time. If you want your echo chamber you'd need a new account to log in to so that way you get a smaller feed because that account is only connnected to one relay.
Sure, /theoretically/ you can do that with a normal account to post your kind1 notes but you'd have to manually set your relays each time you want to change the scope which is a user nightmare. 

Computationally this should be a simple task though, which I relate as very similar to how Amethyst's can change feeds with lists or hashtags. If that is the most basic functionality that is already covers massive ground.