Does ice cream look better in a cone? Sure. But that’s it. If you order it from a restaurant or shop, eating it in a cone feels rushed. With a cup, you can take it home with you and put it in the freezer and save it for later if you want. I would even argue that you will get more ice cream from a cup than there is in a cone. Also, in a cup, you can add toppings more effectively in the ice cream and mix them up in a better way than in a cone. Another thing, cups are less messy. Ice cream always runs the risk of melting in general, but atleast with a cup you have a smaller chance of it dripping on your hands and clothes.
Different use cases. If you want a bunch of toppings, yeah a cup is better. Comes are more mobile and only require one hand so are better for walking around or driving.
A third option, shakes, has entered the chat. Also mobile, but can have toppings too as long as they’ll fit through a straw. Bonus points for not getting all over your hands or face.
I guess my point is, por que no los tres?