Frankly, Charles’ duties and obligations are important to him, but not in the general scheme of things. He could be out of action for a lengthy time- I hope not, though- and his duties could be carried on by others.
Who would carry them on? A lot of his projects are things that he is very committed to and he wants to be the one to see them through. When he is king he will have to set aside a lot of his worlk