Nothing wrong with exposing kids to coding. It's a very difficult thing to learn and there's going to be some that take to it with gusto. That's great because they'll likely be good at it.
The others will learn it's not for them and move on to something else...hopefully they too will find something they love to do.
More than half the battle of working when an adult is finding something you love to do, and by extension, probably be good at.