If a friend jumped off a bridge, would you? Trying to reference things my parents said when I was little. Just because something is useful to one person, doesn't mean it would be to you too. I'd jump off the bridge to try to save them from drowning...but not if over land...I suppose it also depends on how high the bridge was. I never could bring myself to jump off the high diving board at the pool.
If you would use it and you don't mind eating the same thing for many meals/days in a row, and there are recipes you like/love, and you have the ability to purchase one, or you cook for many, then by all means, do so.
If not, then just be content with what you have and how you cook what you cook. If she insists, then she can always buy one for you! No one should force anything on you.