Apparently I'm committing all the tea sins. I definitely make tea in a kettle. But if I do that, I boil the water before adding the tea bags. Isn't that pretty standard? I'd only do so if I'm making a lot of the same tea (or iced tea), usually for a group of people
For that there is a teapot. Some can be continuously heated up, just through external heating methods, such as a candle!
Making tea in a kettle severely decreases life of the kettle and even after washing, some amounts of aroma compounds will remain, affecting the taste and aroma of whatever you boil water for next