Children who start as ice dancers are usually not taught to jump. I know a girl who is a very advanced ice dancer, and she can't even do a waltz jump. it's not that she doesn't have the natural ability: no one ever worked with her on freestyle. Now one of her coaches is teaching her spins, footwork, but those things are only done to supplement her training as a dancer. I don't think she would ever want to switch to freestyle, and even if she had such an idea, she would be way behind other kids her age who started earlier. Of course, her dancing skills would be an asset, but switching disciplines at this point wouldn't be good.
The opposite happens a lot, usually if the child isn't a good jumper. Unfortunately, some kids are in love with freestyle and don't have the patience for ice dance.