We won't resort to that at present because we believe its position next to your current true track is much more useful. The two values are so closely related, that's why we put them there in the first place. And crucially, you can read them both at once rather than having to interact with anything. The position of one in relation to the other also makes it easy to intuitively see whether a turn right or left is needed.
When you pointed to the instrument at the bottom of the screen and said "there", what did he say?